Miscellaneous
Analysis Tools
MAC Address Analyzer - Analyze any MAC address to identify manufacturer, validate format, decode structure (OUI/NIC), determine unicast/multicast and UAA/LAA status with visual breakdown and comprehensive network details. Featured
Password Strength Tester - Analyze password strength with real-time security scoring, entropy calculation, time-to-crack estimation, and detailed improvement suggestions. Test your password security instantly.
Area Converters
Acreage Calculator - Calculate land acreage from dimensions in feet, meters, or yards. Supports rectangular, triangular, and circular shapes with step-by-step calculations, visual diagrams, and comprehensive unit conversions. Featured
Acres to Hectares Converter - Convert acres to hectares instantly with step-by-step formula, visual area comparisons, bidirectional conversion, and a comprehensive reference table. Supports international number formats.
Acres to Perches Converter - Convert acres to perches instantly with interactive visual land area comparison, bidirectional conversion, step-by-step calculations, and historical unit context for surveyors and property owners.
Acres to Square Feet Converter - Convert acres to square feet instantly with visual land area comparison, common property size examples, step-by-step calculation, and comprehensive area conversion reference.
Acres to Square Meters Converter - Convert acres to square meters instantly with visual land size comparisons, bidirectional conversion, common presets, and step-by-step formula breakdown.
Acres to Square Miles Converter - Convert acres to square miles instantly with visual comparisons, step-by-step calculations, and a comprehensive conversion table for land area measurements.
Acres to Square Yards Converter - Convert acres to square yards instantly. Features bidirectional conversion, step-by-step formula, common conversion table, real-world area comparisons, and multi-unit cross-reference.
Hectares to Acres Converter - Convert hectares to acres instantly with visual size comparisons, real-world examples like football fields and farms, plus comprehensive unit conversions including square meters and square feet.
Perches to Acres Converter - Convert perches to acres and acres to perches with visual area comparison, step-by-step calculation, and comprehensive conversion reference table for land measurement.
Square Feet to Acres Converter - Convert square feet to acres instantly with visual area comparison, real-world examples, and step-by-step conversion. Perfect for real estate, land surveys, and property calculations.
Square Meters to Acres Converter - Convert square meters to acres with instant results, visual area comparison diagrams, real-world size references, and comprehensive conversion tables. Free online area converter with land size classification.
Square Miles to Acres Converter - Convert square miles to acres instantly with step-by-step calculations, visual scale comparison, real-world examples, and bidirectional conversion between square miles and acres.
Square Yards to Acres Converter - Convert square yards to acres and acres to square yards instantly. Features visual size comparisons, step-by-step calculations, and multi-unit conversions for land measurement.
Astronomy Tools
Star Visibility Calculator - Estimate how well the stars will be visible tonight from your location. Combine the Bortle light-pollution scale with cloud cover, humidity, and the Moon phase to get a 0-100 stargazing score, your naked-eye limiting magnitude, an estimate of how many stars you can see, and an animated live night-sky preview. Perfect for planning astrophotography, meteor showers, and dark-sky trips. New
Sun Position Calculator - New
Tide Time Calculator - New
Audio Tools
Audio Extractor - Extract audio tracks from your video files online. Select output format (MP3, WAV, AAC, OGG). Client-side processing.
Audio Splitter - Professional audio splitter tool to split and cut audio files online. Supports MP3, WAV, M4A, FLAC, OGG, AAC, WMA and other formats. 100% free, client-side processing ensures privacy. No upload required. Featured
MP3 Looper - Loop any section of your MP3 files with visual waveform display, precise A/B markers, playback speed control, and real-time preview. Set exact loop points, adjust tempo for practice, and export as MP3. All processing happens in your browser for complete privacy. Featured
MP3 Reverser - Reverse your MP3 audio file instantly with our free online tool. Upload any MP3 file up to 10MB, preview both original and reversed audio with waveform visualization, and download the result. Privacy-focused - we never store your files.
Music BPM Tapper - Tap along to a song beat to measure its tempo in beats per minute (BPM) in real time. Includes tap stability, beat interval, tempo names, half-time and double-time controls, and a mobile-friendly tap pad. New
Music Key Transposer - Transpose chords, slash chords, and note lines from one musical key to another. Paste a chord chart, choose the original and target keys, and get a clean transposed version with sharps, flats, note maps, and chord changes. New
🔊 Tone Generator - Generate pure audio tones at any frequency from 1 Hz to 20,000 Hz. Features real-time waveform and spectrum visualization, multiple wave types, musical note presets, binaural beats, and frequency sweep modes. New
Chemical Calculators
Chemical Equation Balancer - Automatically balance chemical reaction equations by finding the correct stoichiometric coefficients for reactants and products. Enter any unbalanced equation and get instant results with detailed explanations and atom conservation verification. New
Corrected Calcium Calculator - Calculate corrected calcium level adjusted for albumin with multiple formulas (Payne, modified), clinical interpretation, visual calcium distribution diagram, and step-by-step calculation breakdown.
Corrected Sodium Calculator - Calculate corrected sodium for hyperglycemia using Katz and Hillier formulas. Includes clinical interpretation, step-by-step calculations, and severity assessment for DKA and HHS management.
Dilution Calculator - Calculate solution dilutions using the M₁V₁ = M₂V₂ equation. Find the stock volume, final volume, or resulting concentration when preparing diluted solutions in the lab. New
Empirical Formula Calculator - Determine the empirical formula of a chemical compound from element mass percentages or experimental mass data. Optionally compute the molecular formula using molar mass. New
Molar Mass Calculator - Calculate the molar mass of any chemical compound with detailed element breakdown, percentage composition, step-by-step calculations, and interactive periodic table.
Molarity Calculator - Calculate molarity (M), mass of solute, or volume of solution with step-by-step formulas. Features common compound database, unit conversion, and dilution calculator. Featured
Mole/Gram/Particle Converter - Convert between moles, grams, and number of particles (atoms, molecules, ions) using molar mass and Avogadro's number. Get step-by-step conversion solutions with detailed formulas. New
Percent Yield Calculator - Calculate the percent yield of a chemical reaction by comparing the actual yield to the theoretical yield. Solve for any unknown variable with detailed step-by-step solutions and efficiency analysis. New
pH Calculator - Calculate pH values from hydrogen ion concentration [H+], pOH, or scientific notation with interactive pH scale visualization and detailed step-by-step calculations.
Stoichiometry Calculator - Convert between moles, mass, and volume in chemical reactions using balanced equations, molar ratios, and molar masses. Get step-by-step stoichiometric solutions. New
Titration Calculator - Calculate the molarity of an unknown acid or base solution using titration data. Features equivalence point pH, indicator recommendations, and step-by-step solutions with titration curve visualization. New
Color Tools
CMYK to Hex Converter - Convert CMYK (Cyan, Magenta, Yellow, Black) color values to Hex code with real-time preview, RGB breakdown, step-by-step conversion, color harmony suggestions, and multiple output formats for web and print design.
Color Code Converter (All Formats) - All-in-one color converter that takes any input color and instantly shows its equivalent values in HEX, RGB, HSL, HSV, and CMYK, with a live preview swatch, accessibility contrast check, and complementary palette. New
Color Contrast Checker - Check color contrast ratios between text and background colors. Test WCAG 2.x AA/AAA compliance for normal and large text with real-time preview, color suggestions, and detailed accessibility analysis.
Color Inverter - Invert colors instantly with our free online tool. Supports HEX, RGB, HSL, CMYK formats with live preview, color wheel visualization, accessibility contrast checker (WCAG), and complementary color generation. Featured
Color Scheme Generator - Generate professional color schemes with complementary, analogous, triadic, split-complementary, square, and tetradic harmonies. Interactive color wheel, real-time preview, CSS/Tailwind export, and accessibility contrast checker.
Gradient Generator - Professional CSS gradient generator with interactive color stops, angle control, preset gradients, and instant code export for CSS, Tailwind, and SVG.
Hex to CMYK Converter - Convert HEX color codes to CMYK (Cyan, Magenta, Yellow, Key/Black) values for print production with visual ink breakdown, step-by-step formulas, and print preview simulation.
Hex to RGB Converter - Convert hexadecimal (hex) color codes to RGB, RGBA, HSL, HSLA, and CMYK values with real-time color preview, complementary colors, shades generator, and one-click copy functionality.
Image Color Picker - Upload any image and instantly pick colors with precision. Get HEX, RGB, HSL, and CMYK codes, extract color palettes, and discover color harmonies - all in one powerful tool.
Palette Generator - Generate beautiful, harmonious color palettes based on color theory. Create analogous, complementary, triadic, split-complementary, tetradic, and monochromatic color schemes with export options for CSS, SCSS, JSON, and Tailwind.
Random Color Generator - Generate random colors instantly with HEX, RGB, and HSL formats. Create color palettes, explore color harmonies, copy color codes with one click, and discover beautiful color combinations for your designs.
Random Color Palette Generator - Generate beautiful, harmonious color palettes instantly. Choose from 6 color harmony modes, lock your favorite colors, and export in HEX, RGB, HSL, and CMYK formats. Perfect for designers, artists, and developers.
RGB to Hex Converter - Convert RGB to hex color code instantly with live preview, multi-format output (HSL, HSV, CMYK), CSS code snippets, color harmony palettes, WCAG contrast checker, and nearest named color matching.
Construction And DIY Calculators
Beam Load Calculator - Estimate the maximum safe load, bending moment, shear, stress, and deflection of beams. Choose support type, load pattern, cross-section, and material to get a strength and serviceability verdict. New
Bolt Torque Calculator - Calculate the recommended tightening torque, clamp-load preload, and yield-margin for a bolt — pick a metric M or imperial UN size, ISO/SAE grade, and lubrication, and compare both the short-form K-factor and the VDI 2230 detailed method. New
Carpet Calculator - New
HVAC Sizing Calculator - New
Insulation Calculator - Calculate recommended R-values, insulation thickness, material quantity, and estimated costs based on your climate zone, building component, and insulation type. New
Lumber Calculator - New
Miter Angle Calculator - Featured
Paver Calculator - New
Pipe Flow Calculator - Calculate flow rate, velocity, Reynolds number, head loss, and pressure drop for fluids in pipes. Compare Hazen-Williams and Darcy-Weisbach + Colebrook-White results side-by-side, with PVC, copper, steel, cast iron, and HDPE pipe presets. New
Rebar Calculator - New
Retaining Wall Calculator - Calculate the number of blocks, gravel, drainage aggregate, geogrid, and total materials needed for your retaining wall project. Get a detailed material list with cost estimates. New
Slope and Grade Calculator - Featured
Stair Calculator - Featured
Steel Weight Calculator - Estimate the weight of steel bars, plates, pipes, tubes, and angles from their dimensions and density. Pick a shape, enter sizes, choose a material, and get per-piece and total weight, volume, surface area, and cost in metric or imperial units. New
Tile Grout Calculator - Calculate exactly how much grout you need for any tiling job. Enter your tile size, grout joint width and depth, and the total area, and instantly get the grout volume, weight in kilograms and pounds, the number of bags to buy, and a coverage estimate per square metre. Includes a live tile-and-joint diagram, a wastage allowance, support for sanded, unsanded and epoxy grout, and both metric and imperial units with a full step-by-step breakdown. New
Cooking Tools
Air Fryer Converter - Convert conventional oven directions into air fryer equivalents with food-specific temperature drops, shorter cooking times, preheat guidance, halfway turning reminders, and practical notes for frozen foods, vegetables, chicken, fish, baked goods, and leftovers.
Baker's Percentage Calculator - Calculate and scale bread recipes using baker's percentages. Convert ingredient weights relative to flour weight, adjust hydration levels, and create perfectly proportioned dough every time. Essential for bakers and bread makers.
Baking Pan Size Converter - Convert recipe ingredient amounts when changing baking pan sizes. Easily switch between round, square, rectangular, and specialty pans with automatic area calculations and ingredient scaling.
Brine and Salinity Calculator - Calculate the precise amount of salt needed for pickling, brining, curing, or fermentation based on your desired salinity percentage. Supports multiple salt types with automatic density conversion.
Butter to Oil Converter - Convert butter amounts into practical oil equivalents for cakes, muffins, brownies, pancakes, and everyday baking. Enter butter in sticks, cups, tablespoons, grams, or ounces, choose an oil type, and get kitchen-friendly oil measurements with baking notes about texture, flavor, and optional liquid adjustments.
Cheese Board Calculator - Calculate exactly how much hard cheese, soft cheese, crackers, cured meats, fruits, and accompaniments you need for a cheese board based on guest count, occasion, and appetite. Get a complete shopping list with per-person breakdowns and board assembly tips.
Chocolate Fountain Calculator - Calculate the exact amount of chocolate, oil, and dipping items needed for your chocolate fountain based on fountain size, guest count, chocolate type, and event duration. Get a complete shopping list with quantities for strawberries, marshmallows, pretzels, and more.
Cooking Unit Converter - Convert between common cooking measurements including cups, grams, tablespoons, teaspoons, ounces, milliliters, and liters. Supports ingredient-specific density conversions for accurate baking and cooking results.
Cups to Grams Converter - Convert volume to weight for specific cooking ingredients. Get accurate gram measurements for cups of flour, sugar, butter, and 50+ common baking and cooking ingredients with density-adjusted conversions.
Dough Hydration Calculator - Calculate dough hydration level (water-to-flour ratio) for perfect bread texture. Features visual dough consistency preview, baker's percentages, and full recipe generator for artisan bread, pizza, bagels, and more.
Fresh to Dried Herb Converter - Convert fresh basil, parsley, thyme, rosemary, oregano, dill, mint, sage, tarragon, cilantro, and mixed herbs into practical dried herb amounts for cooking. Enter a fresh herb quantity in teaspoons, tablespoons, cups, grams, or ounces, choose the herb type and flavor target, and get a kitchen-ready dried equivalent with ratio notes, estimated weights, and guidance on when dried herbs are a good substitute.
Marinade Time Calculator - Find the optimal marinade time for any meat, fish, tofu, or vegetable based on the cut thickness and how acidic your marinade is. See a visual marinade timeline with the under-marinated, optimal, and over-cured zones, a recommended time, the moment it will be ready, and step-by-step food-science reasoning so your food is full of flavor without turning mushy. New
Meat Smoking Calculator - Estimate smoking time based on meat type, weight, and smoker temperature. Get recommended internal temperatures, resting times, wood pairings, and per-pound timing for brisket, pork shoulder, ribs, chicken, turkey, and more.
Pizza Dough Calculator - Calculate exact flour, water, salt, yeast, and olive oil amounts for pizza dough. Choose from Neapolitan, New York, Detroit, or Thin Crust styles with adjustable hydration, fermentation time, and number of pies.
Recipe Scaler - Easily adjust ingredient quantities when scaling a recipe up or down. Enter your ingredients, set original and desired servings, and get perfectly proportioned amounts instantly.
Smoking Wood Pairing Guide - Match the right smoking wood to your meat for the best flavor. Pick a protein (beef, pork, poultry, fish, lamb, game or vegetables) to see ranked wood recommendations with pairing strength and smoke intensity, or pick a wood to see what it pairs with. Covers hickory, mesquite, apple, cherry, oak, pecan, maple, alder and more, with a visual mild-to-strong smoke spectrum and blend suggestions. New
Sourdough Calculator - Calculate precise sourdough bread recipes with adjustable hydration, starter percentage, and salt ratio. Get complete ingredient lists, feeding schedules, and bulk fermentation timing for any loaf size.
Sous Vide Calculator - Use this sous vide calculator to pick a water-bath temperature and holding-time window based on protein cut, thickness, fresh or frozen start, and desired doneness. It recommends practical sous vide settings for steak, pork, chicken, salmon, and turkey, then adds texture notes, finishing guidance, and food-safety reminders for home cooks.
Spaghetti Portion Calculator - Calculate the exact diameter of your dry spaghetti bundle for any number of servings. Features an interactive on-screen circle guide you can hold your pasta bundle against. Supports spaghetti, angel hair, linguine, fettuccine, bucatini, and more.
Taco Bar Calculator - Calculate exactly how many tortillas, pounds of seasoned meat, cheese, salsa, guacamole, and toppings you need per person for a DIY taco bar. Get a complete shopping list with quantities for any group size. Featured
Turkey Cooking Time Calculator - Calculate the ideal cooking time for your turkey based on weight and cooking method. Supports oven roasting, spatchcocked, deep-fried, and smoked options with safe temperature guidelines and a complete cooking timeline.
Wine Pairing Suggester - New
Yeast Conversion Calculator - Easily convert between fresh yeast, active dry yeast, and instant yeast with precise ratios. Perfect for bakers who need to substitute different yeast types in bread, pizza dough, and pastry recipes.
Craft Tools
Beading Pattern Calculator - Calculate exactly how many beads you need for a necklace, bracelet, or anklet from your bead pattern and finished length. Define a repeating pattern of up to 4 bead types with sizes and colors, subtract the clasp, and get a per-color bead count with waste allowance, pattern repeats, and a visual strand preview. New
Crochet Hook Size Converter - Convert crochet hook sizes between US letter/number designations, UK/Canada numbering, and the metric (mm) scale so you can follow any pattern. Pick a size on any one system and instantly see every equivalent, the recommended yarn weight, and where it falls on a visual hook-size scale. Includes a full conversion chart and a separate steel (thread) hook table. New
Cross-Stitch Floss Calculator - Estimate how many skeins of embroidery floss your cross-stitch project needs based on stitch count, fabric (Aida) count, the number of strands you stitch with, and how densely the design is stitched. The calculator works out the thread length per stitch, the total floss length, and the number of standard 8-metre 6-strand skeins to buy, with a visual skein breakdown, a built-in waste buffer, and a step-by-step explanation. Supports metric and imperial output. New
Cross-Stitch Size Calculator - Calculate the finished size of your cross-stitch embroidery project based on your pattern stitch count and fabric count (Aida, evenweave, linen). Supports multiple fabric types, includes margins for framing, and provides size in inches, centimeters, and millimeters.
Embroidery Thread Length Calculator - Estimate how much embroidery floss you need by stitch type: satin stitch fill area, backstitch, stem stitch, chain stitch outlines, and French knots. Get total thread length in meters and yards, the number of 6-strand skeins to buy, and how many working cuts to prepare — with a waste allowance and a per-stitch breakdown chart. New
Fabric Calculator - Calculate the exact amount of fabric needed for sewing projects, quilting blocks, garments, and home decor. Features pattern layout visualization, waste minimization, directional print support, and detailed cutting diagrams.
Knitting Pattern Calculator - Calculate exactly how many stitches to cast on and how many rows to knit for a sweater, scarf, blanket, or any rectangular piece. Enter your gauge (stitches and rows per 4 in / 10 cm) and your finished width and length, and get the cast-on count, total rows, a scaled visual diagram of your project, yarn-quantity estimate, and a full step-by-step breakdown. Supports inches and centimeters. New
Origami Paper Size Calculator - Calculate the origami paper size you need for a desired finished model size. Pick a classic model (crane, masu box, lily, frog and more) or calibrate from your own test fold, then get the exact square to cut, the closest standard origami paper sizes, and a size table for every common kami sheet. Supports cm, mm and inches. New
Pottery Clay Shrinkage Calculator - Account for clay shrinkage when sizing pottery. Calculate the fired size of a wet piece, work backwards from a target fired size to the wet size you should throw or build, or measure your clay body's actual shrinkage rate from a test tile. Includes clay body presets (earthenware, stoneware, porcelain), an animated wet-vs-fired size visual, multi-dimension support, and a step-by-step formula breakdown in inches or centimeters. New
Quilt Binding Calculator - Calculate exactly how much binding and fabric you need to bind a quilt. Enter your quilt width and height, choose a binding strip width and your fabric width, and instantly get the total binding length (with corner and join allowance), the number of strips to cut, the running fabric length, and the yardage to buy. Supports straight-grain and bias binding, double-fold (French) and single-fold binding, inches and centimeters, with a visual diagram and a step-by-step breakdown. New
Yarn Calculator - Calculate how much yarn (yards/meters) you need for sweaters, blankets, scarves, and other knitting or crochet projects. Estimates based on yarn weight, gauge, project size, and stitch pattern.
DIY & Crafts
Candle Wax & Fragrance Oil Calculator - Calculate the exact amount of wax needed for your candle container and determine the correct fragrance oil percentage. Features animated candle visualization, supports multiple wax types, container shapes, and batch calculations.
Resin Casting Volume Calculator - Calculate exactly how much epoxy resin and hardener to mix for your mold. Choose a mold shape (rectangle, cylinder, half sphere), enter a known volume, or use the water-weight method, then get resin and hardener amounts in ml, fluid ounces, and grams for any mix ratio (1:1, 2:1, 3:1 and more) — with waste margin, multiple-mold batches, and an animated mixing-cup diagram. New
Soap Making Lye Calculator (SAP) - Calculate the precise amount of lye (NaOH or KOH) needed for soap making with accurate saponification values for 40+ oils. Includes superfat calculation, water ratios, dual lye support, and safety guidelines for cold process and hot process soap.
Electronics Tools
555 Timer Calculator - Calculate frequency, period, and duty cycle for 555 timer circuits in astable and monostable modes. Enter R1, R2, and C values to get instant results with waveform visualization and step-by-step formulas. New
Battery Life Calculator - Calculate how long a battery will last based on capacity (mAh/Ah/Wh) and device consumption (mA/A/W). Features animated battery visualization, efficiency adjustments, and detailed runtime breakdowns for phones, laptops, IoT devices, and more. Featured
Capacitor Calculator - Calculate stored charge (Q=CV), energy (E=½CV²), and reactance (Xc=1/2πfC) for capacitors. Decode 3-digit ceramic capacitor codes instantly. Interactive animated diagram with step-by-step solutions. New
Decibel (dB) Calculator - Calculate power and voltage gain or loss in decibels, convert between dB and linear scale, and analyze signal levels with dBm and dBW conversions. New
Impedance Calculator - Calculate the total impedance of RLC series and parallel circuits at any frequency. Get magnitude, phase angle, phasor diagram, resonant frequency, Q factor, and step-by-step breakdown. New
LED Resistor Calculator - Calculate the correct current-limiting resistor for LED circuits. Supports single and series LEDs, finds nearest E24 standard resistor values, shows power dissipation, and includes an interactive animated circuit diagram. New
Logic Gate Simulator - Build and simulate digital logic circuits online with AND, OR, NOT, NAND, NOR, XOR and XNOR gates. Get instant truth tables, animated circuit diagrams, canonical Boolean forms and step-by-step evaluation. New
Ohm's Law Calculator - Calculate any electrical value (Voltage, Current, Resistance, Power) using Ohm's Law. Enter any two known values to instantly compute the other two with detailed formulas and step-by-step solutions.
Parallel Resistor Calculator - Calculate the total equivalent resistance of 2 to 10 resistors connected in parallel. Features an interactive circuit diagram, step-by-step formula breakdown, current distribution analysis, and power sharing visualization. New
PCB Trace Width Calculator - Calculate the required trace width for your printed circuit board (PCB) based on current, temperature rise, and copper weight using IPC-2221 standard formulas. Includes visual trace preview, resistance calculation, and voltage drop analysis.
Power Factor Calculator - Calculate real, reactive, and apparent power relationships, power factor correction, and power triangle analysis for AC circuits. Get step-by-step breakdown with formulas. New
RC Time Constant Calculator - Calculate RC charging and discharging curves, time constants, and voltage at any given time for resistor-capacitor circuits. Get step-by-step formulas and a complete time constant table. New
Resistor Color Code Calculator - Calculate resistance values from color bands with an interactive visual resistor diagram. Supports 4-band, 5-band, and 6-band resistors with real-time updates, tolerance ranges, and detailed explanations.
Resonant Frequency Calculator - Calculate resonant frequency, bandwidth, and Q factor for LC and RLC circuits in series and parallel configurations. Solve for frequency, inductance, or capacitance with step-by-step MathJax formulas. New
Transformer Calculator - Calculate turns ratio, secondary voltage, primary and secondary current, and power for electrical transformers. Get step-by-step MathJax formulas for ideal and real transformer analysis. New
Voltage Divider Calculator - Calculate output voltage from a resistor divider network. Enter input voltage, R1, and R2 to find Vout instantly. Includes reverse calculation, interactive circuit diagram, step-by-step formulas, and power dissipation analysis. New
Voltage Drop Calculator - Calculate voltage drop in electrical wires based on wire type (copper/aluminum), AWG size, length, and load current. Essential for safe electrical installations, NEC compliance, and preventing power loss in residential, commercial, and industrial wiring.
Wire Gauge Calculator - Calculate wire diameter, cross-sectional area, resistance per length, ampacity ratings, and voltage drop for American Wire Gauge (AWG) sizes from 4/0 to 40 AWG. Supports copper and aluminum conductors with NEC ampacity tables. New
Encoders And Decoders
Atbash Cipher Tool - Encode and decode text with the ancient Atbash mirror cipher (A↔Z, B↔Y, C↔X, …). Includes a live mirror visualization, full pair table, biblical Hebrew Atbash variant, digit-mirror mode, and round-trip self-inverse proof. New
Base64 Decoder - Decode Base64 encoded strings to plain text with detailed byte analysis, character breakdown, multiple output formats (text, hex, binary), URL-safe support, and encoding validation.
Base64 Encoder - Encode text or files to Base64 with multiple encoding variants (Standard, URL-safe, MIME), real-time preview, encoding process visualization, and one-click copy. Supports UTF-8, ASCII, and binary data.
JWT Decoder - Decode JSON Web Tokens (JWT) to view the header and payload claims without verifying the signature. Visualize token structure, analyze claims, check expiration times, and debug authentication issues easily. 100% client-side processing for privacy.
JWT Generator - Generate signed JSON Web Tokens (JWT) with custom header, payload claims, and HMAC signing algorithms (HS256/HS384/HS512). Includes quick claim presets, expiry helper, live token preview, and a visual breakdown of the three JWT segments. New
Morse Code Decoder - Decode Morse code to text instantly. Features visual Morse code chart, audio preview, and step-by-step decoding breakdown for easy learning.
Morse Code Generator - Convert text to morse code with visual breakdown and audio playback. Learn International Morse Code with step-by-step character translation and sound generation. Featured
ROT13 Encoder/Decoder - Encode and decode ROT13 ciphertext instantly with a live alphabet wheel, character-by-character mapping, ROT5 for digits, ROT18 for letters and digits, and ROT47 for all printable ASCII characters. New
Text to Binary/Hex/ASCII Converter - Convert text to binary, hexadecimal, and ASCII codes (or decode them back) with a live multi-format preview, per-character breakdown, separator and padding options, and full Unicode (UTF-8) support. New
URL Decoder - Decode URL-encoded (percent-encoded) strings with real-time preview, recursive multi-layer decoding, URL component breakdown, query parameter parsing, and encoding analysis. Supports UTF-8 and all percent-encoded characters.
URL Encoder - Encode text for URLs with multiple encoding modes (RFC 3986, Query String, Form Data), visual character-by-character breakdown, and comprehensive encoding analysis. See exactly which characters get encoded and why.
UUID Validator/Decoder - Validate UUID strings, normalize GUID formats, and decode UUID v1, v4, and v5 metadata including timestamp, variant, node, random payload, and v5 namespace/name verification. New
Vigenère Cipher Tool - Encrypt and decrypt text with the Vigenère polyalphabetic cipher using a user-supplied keyword that shifts each letter by a varying amount. Live key-alignment stream, tabula recta visualization, Autokey and Beaufort variants, round-trip proof, and Kasiski period hint. New
Environmental Calculators
🌍 Carbon Footprint Calculator - Estimate your annual carbon footprint from transportation, home energy, diet, and shopping. Get personalized reduction tips, visual breakdowns, and compare with national and global averages. New
Compost Calculator (C:N Ratio) - Calculate the carbon-to-nitrogen (C:N) ratio of a compost pile from brown and green material proportions. Get a visual recipe, ideal 25:1 to 30:1 target guidance, and practical correction tips for fast, odor-free composting. New
EV Range Calculator - Estimate the real-world range of any electric vehicle from battery capacity, efficiency, speed, temperature, climate use, terrain and driving mode. Visual battery gauge, factor breakdown and charging cost estimate. New
Heat Loss Calculator - New
Solar Panel Calculator - New
Solar ROI Calculator - New
Water Usage Calculator - Estimate household water consumption in gallons or liters from people, shower and toilet fixtures, laundry, dishwasher loads, faucets, outdoor use, and daily usage habits. New
File Conversion
HEIC to JPG Converter - Convert HEIC/HEIF images to JPG format instantly in your browser. Batch conversion, adjustable quality, file size comparison, and image preview. 100% free, private, and no upload required.
HEIC to PNG Converter - Convert HEIC/HEIF images to PNG format instantly. 100% client-side processing ensures your photos never leave your device. Supports batch conversion with ZIP download.
Forex Tools
Major Forex Pairs Order Generator - Generate forex trading orders for 28 major currency pairs based on your currency strength analysis. Select LONG, SHORT, or NO ENTRY for each currency and get optimized trading signals.
Random Forex Pairs Order Generator - Generate random LONG or SHORT forex trading orders for 28 major currency pairs. Perfect for paper trading practice, strategy testing, and eliminating emotional bias in trading simulations.
Fun
Buzzword Bingo Generator - Generate randomized Bingo cards filled with corporate buzzwords like Synergy, Deep Dive, and Circle Back. Perfect for your next meeting — mark off each buzzword as you hear it!
Christmas Tree Calculator - Calculate the exact length of lights, number of baubles, tinsel, and ribbon needed for your Christmas tree. Uses cone geometry based on tree height and base width to give you a precise shopping list so you never buy too much or too little.
Hamster Power Calculator - Calculate how many hamsters running on exercise wheels would be needed to power your house, charge a Tesla, run a gaming PC, or operate any appliance. Based on real hamster exercise data.
Helium Balloon Lift Calculator - Calculate how many standard helium balloons are needed to lift a person, object, or even a house (Up style!) using Archimedes' buoyancy principle. Includes fun presets, balloon type options, and altitude effects.
Human to Ant Weight Converter - Find out how many ants it takes to weigh as much as you, and how much you could lift if you had the strength-to-weight ratio of an ant. Compare across 8 ant species with fun size comparisons and animated visualizations.
Keyboard Mileage Calculator - Estimate how many miles or kilometers your fingers have traveled across the keyboard based on your typing speed (WPM) and years of typing. Discover surprising distance equivalents and see your finger journey visualized.
Kinetic Energy Chicken Cooker - Based on the viral internet meme: calculate how many slaps it takes to cook a raw chicken, or how fast a single slap must be. Uses real thermodynamics (Q = mcΔT) and kinetic energy (KE = ½mv²) to answer the ultimate physics question.
Poop Salary Calculator - Calculate how much money you earn while using the bathroom at work. Enter your annual salary and daily bathroom minutes to find out your yearly poop pay, lifetime earnings, and fun equivalents.
Popcorn Fill Room Calculator - Calculate how many popcorn kernels you need to completely fill a room. Enter room dimensions, choose kernel type, and see the total volume, weight, and cost of popcorn required with interactive 3D visualization.
Sick Day Probability Calculator - Predict how believable your sick day excuse will be based on day of week, weather, recent absence history, and excuse type. Get a satirical believability score, boss suspicion radar, and pro tips to improve your odds.
Teleportation Error Rate Calculator - Calculate the probability of quantum reconstruction errors during teleportation based on your body mass, distance, and teleporter model. Find out if you'll arrive with extra body parts, reversed organs, or worse.
Vampire Apocalypse Calculator - Simulate a vampire outbreak using the Lotka-Volterra predator-prey model. Set initial populations, feeding rates, and conversion rates to see how quickly humanity falls — or fights back.
Zombie Survival Time Calculator - Estimate how long you'd survive a zombie apocalypse based on your location population density, available food supplies, weapon access, and cardio fitness level.
General Tools
0–60 / Quarter Mile Calculator - Estimate 0–60 mph acceleration, quarter mile elapsed time, trap speed, and power-to-weight ratio from horsepower and curb weight. Supports hp, kW, PS, pounds, kilograms, drivetrain loss, and launch grip. New
24 Game Solver & Trainer - Enter 4 numbers to solve the 24 game with +, -, *, /. Generate random practice cards by level and train mental arithmetic with instant answer checks.
Age Calculator - Calculate your exact age in years, months, weeks, days, hours, minutes, and seconds with interactive visualization, birthday countdown, life milestones tracker, and personalized insights.
Air Conditioner BTU Calculator - Calculate the exact BTU cooling capacity needed for your room based on dimensions, ceiling height, sun exposure, occupancy, and other factors. Get AC unit size recommendations.
Aquarium Substrate Calculator - Calculate exactly how much substrate (gravel, sand, aqua soil) is needed for your aquarium based on tank dimensions and desired depth. Features live 3D tank preview, multiple substrate types, and instant weight calculations in pounds and kilograms.
Aquarium Volume & Stocking Calculator - Calculate accurate aquarium water volume for rectangular, cylindrical, bow front, hexagonal, and corner tanks. Get fish stocking recommendations using inch-per-gallon and surface area methods with animated 3D tank visualization.
Backpacking Food Weight Calculator - Calculate how much food weight to carry for a backpacking, trekking, or thru-hiking trip. Estimate total calories, food weight, daily carry, safety buffer, meal split, and day-by-day pack weight burn-down with imperial or metric units. New
Banana Radiation Calculator - Convert any radiation exposure into Banana Equivalent Dose (BED). Find out how many bananas equal a dental X-ray, CT scan, or airline flight — free online calculator with comparison chart.
Barcode Generator - Generate professional barcodes in multiple formats (CODE128, CODE39, EAN-13, UPC, ITF-14, MSI, Pharmacode) with customizable appearance. Download as SVG or PNG for free.
BBQ Calculator - Calculate exactly how much meat, buns, side dishes, condiments, drinks, and charcoal or propane you need for a BBQ based on guest count, appetite level, grill type, and event style. Get a complete shopping list with per-person breakdowns.
Beer Chill Time Calculator - Calculate exactly how long your beer needs to chill in the fridge, freezer, or ice bath to reach the perfect drinking temperature. Uses Newton's Law of Cooling with support for cans, bottles, growlers, and different beer styles.
🖱️ Click Counter - Free online click counter tool to count clicks, taps, and keystrokes. Features multiple counters, CPS tracking, keyboard shortcuts, sound effects, and full mobile touch support. New
Cocktail ABV Calculator - Calculate the final ABV (alcohol by volume) of any cocktail or mixed drink. Add ingredients with their volume and ABV, factor in ice melt dilution, and get an accurate alcohol percentage with visual breakdown and step-by-step calculation.
Coffee Brew Ratio Calculator - Calculate the optimal coffee-to-water ratio for your preferred brewing method including Pour Over, Espresso, French Press, Cold Brew, AeroPress, Moka Pot, and Drip Coffee. Adjust strength from light to extra strong.
Commute Life Wasted Calculator - Calculate the total days, months, and years of your life spent commuting to work. Enter your daily round-trip travel time and years worked to reveal the staggering total and explore what else you could do with that time.
Cost of Smoking Calculator - Calculate the true financial cost of smoking over time. See daily, monthly, yearly, and lifetime costs with investment opportunity analysis and health recovery timeline.
Crossword Puzzle Maker - Generate custom crossword puzzles from your own words and clues. Auto-arranges intersections for optimal fit, assigns numbered clues for Across and Down, and produces interactive puzzles you can solve online or print. Perfect for teachers, educators, puzzle enthusiasts, and event organizers. Featured
Cryptogram Generator - Encrypt famous quotes or custom text using a substitution cipher. Solve cryptogram puzzles interactively with real-time letter tracking, hint system, animated reveals, and difficulty levels. Perfect for brain training, education, and word puzzle enthusiasts.
CTR Calculator - Free online CTR calculator to compute click-through rate from impressions and clicks. Compare multiple campaigns, see industry benchmarks, and find how many clicks you need to hit your target CTR. New
Daily Time Savings Calculator - Calculate how much time you can save per year by saving just a few minutes each day. Discover the cumulative impact of small daily time savings with detailed breakdowns and visual comparisons.
💧 Dew Point Calculator - Calculate the dew point temperature from air temperature and relative humidity using the Magnus formula. Includes comfort assessment, frost point, wet-bulb estimate, step-by-step calculation, and interactive dew point chart. New
⚔️ DPS Calculator - Calculate damage per second (DPS) for any weapon loadout. Includes raw DPS, sustained DPS with reload, effective DPS with critical hits, burst damage, and time-to-kill analysis with animated visualizations. New
Email Reply Time Calculator - Calculate the optimal email reply time based on sender status, urgency, and your relationship. Avoid looking too eager or too aloof with our playful timing algorithm that factors in workplace dynamics and social psychology.
Facebook Ad Cost Calculator - Estimate Facebook and Instagram ad costs based on your budget, industry, campaign objective, and target audience. Calculate CPM, CPC, CPA, projected reach, clicks, and conversions with real industry benchmarks. New
Falling Through Earth Calculator - Calculate exactly how long it takes to fall through a hypothetical tunnel drilled through the center of the Earth. Explore the classic ~42-minute gravity train problem with both uniform density and realistic PREM variable density models. See maximum speed at the core, experience weightlessness timing, and compare with real-world travel speeds.
Fertilizer Calculator (NPK) - Calculate how much NPK fertilizer to apply from garden bed area, target nutrient rate, and the N-P-K percentages printed on the fertilizer bag. Shows exact product weight plus N, P2O5, and K2O delivered. New
Flight Distance Calculator - Calculate the great-circle air-route distance between airports, major cities, or coordinates. Estimate flight time using typical aircraft cruising speeds, route allowance, nautical miles, bearing, and an animated route map. New
Frost Date Calculator - Estimate average first and last frost dates from a USDA hardiness zone and geographic region. Plan safe planting windows, growing season length, and crop timing around frost risk. New
Futoshiki Generator - Generate Futoshiki inequality logic puzzles with customizable grid sizes from 4×4 to 9×9. Fill the grid so each row and column contains unique numbers while respecting greater-than and less-than signs between adjacent cells. Solve interactively with pencil marks, timer, error checking, and print support.
🎰 Gacha Pity Calculator - Calculate the probability of getting a 5-star or featured character in gacha games like Genshin Impact, Honkai Star Rail, Wuthering Waves, and more. Visualize pity curves and estimate pulls needed. New
🎮 Game Sensitivity Converter - Convert mouse sensitivity settings between popular FPS games like CS2, Valorant, Overwatch 2, Apex Legends, and more. Calculate your cm/360° and find equivalent sensitivity across all games instantly. New
Gas Mileage Calculator - Calculate real-world gas mileage from fill-up data. Enter distance driven or odometer readings plus fuel added to get MPG, L/100km, km/L, trip cost, range, and CO2 estimates. New
Hashi (Bridges) Puzzle Generator - Generate Hashi (Hashiwokakero) bridge puzzles with four difficulty levels. Connect islands with single or double bridges so each island's number matches its total bridges and all islands form one connected network. Features interactive solving, timer, and solution checking.
🌡️ Heat Index Calculator - Calculate the heat index (apparent temperature) from air temperature and relative humidity using the official NWS Rothfusz formula. Includes danger level assessment, step-by-step calculation, and interactive heat index chart. New
Homebrew ABV Calculator (Alcohol by Volume) - Calculate the alcohol by volume (ABV) in your homebrewed beer, wine, cider, or mead using original and final gravity readings. Features multiple formulas, Brix support, visual fermentation animation, attenuation calculation, and calorie estimation.
How Old Are You? - Find out exactly how old you are in years, months, weeks, days, hours, minutes, and seconds. Get life milestones, birthday countdown, zodiac sign, and detailed age breakdown.
🎮 In-Game Currency Converter - Convert real money (USD, EUR, GBP) to in-game currencies for popular games like Fortnite V-Bucks, Roblox Robux, Genshin Impact Primogems, and more. Find the best value packs and compare exchange rates instantly. New
Influencer ROI Calculator - Calculate the return on investment for influencer marketing campaigns. Analyze cost per engagement, earned media value, conversion rates, and compare performance across Instagram, TikTok, YouTube, and Twitter/X with industry benchmarks. New
Instagram Engagement Rate Calculator - Calculate your Instagram engagement rate from likes, comments, saves, and followers. Compare against industry benchmarks by account size and get actionable tips to boost your social media performance. New
Instagram Font Generator - Convert normal text into 25+ stylish Unicode fonts for Instagram bios, captions, and comments. Includes bold, italic, script, gothic, bubble, and decorative text styles that work on any platform. New
IP Address to Binary Converter - Convert IP addresses to binary with interactive visual breakdown, step-by-step explanation, and multiple output formats. Supports both IPv4 and IPv6 addresses.
IP Address to Hex Converter - Convert IP addresses (IPv4/IPv6) to hexadecimal with interactive visual breakdown, multiple output formats, step-by-step conversion explanation, and network analysis. Featured
IP Subnet Calculator - Calculate subnet masks, network addresses, broadcast addresses, and available host ranges from CIDR notation. Includes interactive binary visualization and address space mapping. New
Is JavaScript Enabled? - Instantly check if JavaScript is enabled in your browser and explore a full diagnostic of your browser's JavaScript capabilities, APIs, and features.
Job Finder - Find your dream job by searching millions of listings from thousands of job boards, company pages, and recruitment sites in one place.
Julia Set Generator - New
Kakuro Generator - Generate Cross Sums (Kakuro) puzzles with adjustable size, difficulty, symmetry, and optional solution reveal for printing or practice.
KenKen Generator (Calcudoku) - Generate KenKen puzzles with valid cage targets, operation mix controls, and optional solution reveal for classroom practice or daily brain training.
Killer Sudoku Generator - Generate Killer Sudoku puzzles combining classic Sudoku rules with Kakuro-style cage sums. Choose from Easy to Expert difficulty, solve interactively with pencil marks, track your time, or print for offline play. Each puzzle has a unique solution.
Knot Tying Reference Tool - Explore common outdoor knots with an interactive chooser, animated rope diagrams, step-by-step tying instructions, best-use guidance, safety notes, and a mobile-friendly comparison table for camping, hiking, boating, tarps, loads, and practice knots. New
Lawn Fertilizer Calculator - Calculate how much lawn fertilizer to apply from lawn area, nitrogen rate per 1,000 sq ft, and the N-P-K fertilizer analysis. Includes product weight, bag coverage, and nutrients applied. New
Lego Brick House Calculator - Estimate how many standard 2×4 Lego bricks are needed to build a life-size house. Enter your house dimensions, wall thickness, and window/door count to get a detailed brick count, total weight, estimated cost, and fascinating comparisons with real-world Lego structures.
Light Bulb Savings Calculator - Calculate how much money you save by switching from incandescent or CFL to LED light bulbs. Compare energy costs, bulb replacement costs, lifespan, and see your payback period with a 10-year cost projection.
🎲 Loot Drop Probability Calculator - Calculate your chances of getting rare loot drops over multiple attempts. Visualize probability curves, see expected attempts, and plan your grind with step-by-step math breakdowns for any game. New
Mandelbrot Set Explorer - New
Maze Generator - Generate random, solvable mazes with custom dimensions, start/end points, and colors. Download as PNG, SVG, or animated GIF solution.
Meeting Cost Ticker - See the real-time cost of your meeting ticking up like a taximeter. Enter the number of attendees and average hourly rate, then start the timer to watch the cumulative cost grow second by second.
Miles per Gallon Calculator - Calculate MPG (miles per gallon), convert to L/100km, estimate fuel costs, compare vehicle efficiency, and track CO2 emissions with our comprehensive fuel economy calculator.
Nonogram Generator (Picross) - Upload an image and instantly create a Nonogram puzzle with row and column clues, answer key, and printable puzzle board.
Number to Word Converter - Convert any number to English words instantly. Supports cardinal, ordinal, and currency formats. Featured
Packing List Generator - New
Paper Size Reference - Quickly compare A-series paper sizes, US Letter, Legal, Tabloid, and custom paper dimensions in mm, inches, points, pixels, aspect ratio, and printable area. New
Parking Ratio Calculator - Calculate the required number of parking spots based on building square footage and usage type. Supports retail, office, residential, restaurant, medical, hotel, industrial, and more with ITE standard parking ratios.
Penny Drop Impact Calculator - Calculate the terminal velocity and impact force of a penny dropped from any height. Debunk the famous Empire State Building penny myth with real physics — drag coefficients, air density, and energy comparisons.
Pizza Party Planner - Calculate the perfect number of pizzas for your party based on guest count, appetite level, pizza size, and event type. Get detailed breakdowns with cost estimates, vegetarian splits, and per-person serving analysis.
Plant Spacing Calculator - Calculate the optimal number of plants for any garden area using square grid or triangular spacing layouts. Visualize planting patterns, compare efficiency, and maximize your garden yield with interactive layout diagrams.
QR Code Generator - Create custom QR codes for URLs, text, WiFi, email, and phone numbers. Customize colors, size, error correction, and download as PNG instantly.
Quote Finder - Find thousands of quotes by author or phrase. Dive into a comprehensive quote database today!
Raised Bed Soil Calculator - Calculate how much soil mix you need for a raised garden bed from length, width, and depth. Includes cubic feet, cubic yards, liters, fill ratio, settling allowance, bag estimates, and soil mix breakdowns. New
ROAS Calculator - Free ROAS calculator to measure advertising efficiency. Calculate return on ad spend, compare multiple campaigns, find target revenue needed, and benchmark against industry averages. New
Shower Cost Calculator - Calculate the exact water and energy cost of each shower based on duration, flow rate, water heater type, and local utility rates. Compare daily, monthly, and yearly costs with water-saving tips and habit change projections.
Sleeping Bag Temperature Rating Guide - Convert sleeping bag temperature ratings between EN, ISO, and common brand labels. Decode comfort, limit, and extreme ratings, estimate men's/unisex and women's brand equivalents, and adjust the result for cold sleepers, sleeping pad R-value, and wet or windy trip conditions. New
Slitherlink Puzzle Generator - Generate Slitherlink (Fences/Loop) puzzles with four difficulty levels. Connect adjacent dots to form a single closed loop guided by number clues inside cells. Features interactive canvas-based solving, timer, error checking, and solution reveal.
❄️ Snow Day Calculator - Predict the probability of a snow day based on weather conditions including temperature, snowfall forecast, wind speed, and more. Get a detailed factor-by-factor breakdown of your snow day chances. New
Social Media Image Size Guide - Complete reference for recommended image and video dimensions across Instagram, Facebook, Twitter/X, YouTube, TikTok, LinkedIn, and Pinterest. Covers profile pictures, cover photos, posts, stories, reels, and ad formats with visual previews. New
Social Media Post Time Optimizer - Find the best times to post on Instagram, Twitter/X, Facebook, TikTok, LinkedIn, and YouTube. Get personalized posting schedules based on your audience timezone with visual heatmaps and golden hour recommendations for maximum engagement. New
Social Media ROI Calculator - Calculate the return on investment for social media marketing campaigns. Input ad spend, revenue generated, engagement metrics, and conversion rates to measure campaign effectiveness with visual performance analysis. New
Social Media Username Checker - Free online tool to check if a username is available across 15+ social media platforms instantly. Find and claim your unique handle on Instagram, X/Twitter, TikTok, YouTube, GitHub, and more. New
Spirograph Generator - New
Sudoku Generator & Solver - Generate unique 9x9 Sudoku puzzles from Easy to Evil, solve your own puzzles instantly, and print clean puzzle sheets to PDF for offline play.
Tent Footprint Size Calculator - Calculate the right tent footprint size from your tent floor dimensions. Choose imperial or metric units, set the undercut margin per side, and get finished footprint dimensions, DIY cut size, area coverage, and a clear visual layout. New
Tessellation Generator - New
TikTok Engagement Rate Calculator - Free TikTok engagement rate calculator. Analyze video performance by measuring engagement from views, likes, comments, and shares with visual benchmarks and actionable insights. New
TikTok Money Calculator - Free TikTok money calculator to estimate creator earnings from the Creator Fund, brand deals, and live gifts. Enter your views, followers, and engagement rate to see potential monthly and yearly revenue by niche. New
Tire Size Calculator - Compare two tire sizes side by side with visual diagrams, speedometer correction, and detailed measurements including diameter, circumference, sidewall height, and revolutions per mile. New
Toilet Paper Value Calculator - Compare toilet paper rolls by price, sheets, and ply count to find the true cost per sheet and cost per effective wipe. Add up to 5 products side-by-side to identify the best value.
Trailer Tongue Weight Calculator - Calculate the ideal trailer tongue weight (typically 10-15% of total trailer weight) for safe, stable, sway-free towing. Enter your loaded trailer weight to get the recommended tongue-weight range, or enter a measured tongue weight to get an instant safety diagnosis (too light = trailer sway, too heavy = overloaded hitch). Includes an animated load-balance diagram, a cargo-shift advisor that tells you which way to move cargo, and a step-by-step breakdown. Supports pounds and kilograms. New
Twitch Earnings Calculator - Estimate Twitch streamer earnings from subscriptions, ads, bits, and donations. Compare Affiliate vs Partner revenue splits with detailed breakdowns, growth projections, and monetization tips for streamers at every level. New
Twitter/X Character Counter - Count characters for Twitter/X posts with real-time feedback. Shows remaining characters, detects URLs (counted as 23 chars), and handles emoji and CJK character counting accurately. New
Twitter/X Timestamp Converter - Convert a Twitter/X post URL or Tweet ID (Snowflake ID) to the exact date and time it was posted. Also converts dates to Snowflake IDs for advanced search filtering on Twitter/X. New
Vehicle Towing Capacity Calculator - Determine whether your vehicle can safely tow a loaded trailer by checking GCWR, curb weight, passenger and cargo weight, trailer weight, tongue weight, optional GVWR, tow rating, and hitch tongue rating. New
Vehicle Weight Distribution Calculator - Calculate front and rear axle weight distribution for any vehicle. Enter the total weight with a front/rear balance, or enter the individual axle weights, and instantly see the axle loads, the front/rear percentage split, the longitudinal center-of-gravity position along the wheelbase, and the likely handling balance (understeer, neutral, or oversteer). Includes an animated side-view diagram, a left/right cross-weight check, lb and kg units, and a step-by-step breakdown. New
Wedding Alcohol Calculator - Estimate how many bottles of wine, beer, and spirits you need for a wedding or party. Customize guest count, event duration, drinking levels, and beverage mix to get accurate drink estimates with a visual shopping list.
🌬️ Wind Chill Calculator - Calculate the wind chill temperature from air temperature and wind speed using the official NWS formula. Includes frostbite risk assessment, step-by-step calculation, and interactive wind chill chart. New
Word Ladder Generator - Generate word ladder puzzles where you transform one word into another by changing a single letter at each step. Features interactive play mode, animated step-by-step solutions, difficulty levels, and curated puzzle examples. Perfect for vocabulary building, ESL learning, brain training, and word game lovers. Featured
Word Scramble Generator - Generate word scramble puzzles from any word list. Features interactive letter-tile animations, difficulty levels, hints, timer mode, and printable worksheets. Perfect for teachers, vocabulary practice, ESL learning, and word game enthusiasts. Featured
Word Search Puzzle Generator - Create custom word search puzzles by entering a list of words. Choose grid size (8-25), difficulty levels (horizontal, vertical, diagonal, reverse), and color themes. Interactive puzzle with click-and-drag word finding, print-friendly layout, and answer key. Perfect for teachers, educators, and puzzle enthusiasts.
Word to Phone Number Converter - Convert words and phrases to phone numbers using the international standard T9 keypad letter mapping. Perfect for creating memorable phone numbers and understanding alphanumeric encoding. Featured
YouTube Channel Statistics - Free online tool to view real-time YouTube channel statistics including subscriber count, total views, video count, average views per video, and channel creation date. See Play Button milestone progress powered by the official YouTube Data API. New
YouTube Comment Picker - Free online tool to randomly pick comments from any YouTube video. Perfect for giveaways, contests, and selecting winners fairly from video comments. New
YouTube Earnings Estimator - Estimate YouTube ad revenue for any channel or video based on views, niche CPM, and monetization rate. See daily, monthly, and yearly earnings projections with detailed breakdowns, RPM analysis, and revenue optimization tips. New
YouTube Shorts Monetization Calculator - Estimate potential earnings from YouTube Shorts based on views, niche RPM rates, and the Shorts revenue sharing model. Compare Shorts revenue with long-form video earnings, visualize the revenue flow, and project growth over time. New
YouTube Tag Extractor - Free online tool to extract tags and keywords from any YouTube video URL. Analyze video tag strategy, get SEO insights, and copy tags in multiple formats for your own content optimization. New
YouTube Thumbnail Downloader - Free online tool to download YouTube video thumbnails in all available resolutions. Paste any YouTube URL or video ID to instantly preview and save HD, SD, and default thumbnail images. New
YouTube Watch Time Calculator - Calculate total watch time for YouTube playlists or video sets. Enter video durations to see total hours and track progress toward the 4,000 watch hour monetization requirement. New
Image Tools
Add Line to Image - Draw lines directly onto your images with customizable colors, styles, and thickness. Features include solid, dashed, dotted, and brush strokes, zoom controls, undo support, and instant PNG download. 100% private - images never leave your device.
Add Text to Image - Add custom text overlays to images with multiple layers, fonts, colors, and effects like shadow, outline, glow, and 3D. Free online tool with drag-and-drop positioning. Featured
⬛ Aspect Ratio Calculator - Calculate, convert, and visualize aspect ratios for video, photography, and social media. Resize dimensions while maintaining proportions with live preview. New
Collage Maker - Create stunning photo collages online for free with 6 professional layouts, customizable gaps, background colors, drag-and-drop reordering, and high-resolution downloads. 100% private - all processing in your browser. Featured
Connect the Dots Generator - Upload any image and instantly convert it into a numbered connect-the-dots puzzle. Adjust dot count, size, and numbering. Download or print your custom dot-to-dot activity sheet. Perfect for kids, teachers, and puzzle lovers. Featured
EXIF Data Viewer/Remover - View and remove EXIF metadata from your photos (JPG, PNG, WebP, HEIC, TIFF) directly in your browser. Inspect camera, lens, exposure, GPS, software and timestamp tags, preview the embedded thumbnail, see GPS coordinates on an instant map, then strip every tag — losslessly for JPEG — and download a clean copy. 100% client-side: your photos never leave your device. New
Flip GIF - Flip animated GIFs horizontally (mirror) or vertically online for free. 100% privacy - files are processed in your browser, never uploaded to any server.
Flip Image - Flip images horizontally (mirror) or vertically online for free. 100% private - all processing happens in your browser. No upload required.
GIF Maker - Create stunning animated GIFs from your images with drag-and-drop simplicity. Adjust speed, quality, and dimensions. 100% browser-based for complete privacy.
Image Censor - Protect privacy in your photos by censoring sensitive areas with pixelation, blur, or solid color. 100% client-side processing - your images never leave your device.
Image Compressor - Compress and resize images instantly in your browser. Supports JPEG, PNG, and WebP output with batch processing, visual comparison, and ZIP download. 100% private — files never leave your device. Featured
Image Cropper - Crop images online for free with preset aspect ratios (1:1 Square, 16:9, 4:5 Portrait). No upload required - all processing done locally in your browser for complete privacy.
Image Enhancer - Enhance your images instantly with our free online tool. Adjust brightness, contrast, saturation, sharpness, and temperature. Apply professional preset filters like Vivid, B&W, Vintage, and Cinematic. 100% browser-based - your images stay private.
Image Flipper - Flip images horizontally or vertically with live preview, batch processing, output format selection (PNG/JPEG/WebP), and quality control. 100% browser-based, private, and free.
Image Resizer - Resize images online for free. Supports JPG, PNG, GIF, WebP. Batch processing, social media presets, aspect ratio lock. 100% private - images never leave your browser. Featured
Image Rotator - Rotate one or multiple images by any angle (0-360 degrees) with live preview, quick presets, and batch download. Free, fast, and works entirely in your browser.
Image Splitter - Split images into multiple parts with customizable grid layouts. Features draggable guide lines, quick presets for Instagram carousels and grids, zoom controls, and batch ZIP download. 100% private - all processing happens in your browser. Featured
Image to ASCII Art Converter - Convert any image (PNG, JPG, GIF, WebP, BMP) into ASCII text art directly in your browser. Choose from 7 character ramps, adjust width, contrast, brightness, invert tones, preview side-by-side, and copy or download the result. All processing happens on your device — your images are never uploaded. New
Image to SVG Tracer - Trace any bitmap image (PNG, JPG, GIF, WebP, BMP) into clean, scalable SVG vector paths directly in your browser. Choose color count, smoothing, edge detection, and path simplification — preview alongside the original, then copy or download the SVG. Everything runs locally; your images are never uploaded. New
Lorem Picsum / Placeholder Image Generator - Generate placeholder images of any size with custom colors, text, and styles. Live canvas preview, multi-service URL builder (Lorem Picsum, Placehold.co, DummyImage), ready-to-paste HTML / Markdown / JSX snippets, and instant PNG / JPG / SVG download. New
📷 OCR / Image to Text - Extract text from images instantly using OCR technology. Supports 100+ languages, drag-and-drop upload, clipboard paste, and image preprocessing. All processing happens in your browser — your images never leave your device. New
Print Size & Resolution Calculator (DPI/PPI) - Calculate the maximum high-quality print size for your digital images. Enter your image dimensions in pixels and desired DPI to see exactly how large you can print while maintaining sharp quality. Features visual comparison, standard print sizes, and quality recommendations.
Key Generators
Django Secret Key Generator - Generate cryptographically secure SECRET_KEY values for Django projects with entropy analysis, character composition visualization, and one-click copy. Essential for Django security.
GUID / UUID Generator - Generate random 128-bit GUID/UUID identifiers (v1, v4, v5) compliant with RFC 4122. Features visual structure breakdown, multiple formats, batch generation, and UUID validation.
MAC Address Generator - Generate random MAC addresses in multiple formats with prefix support, OUI lookup, unicast/multicast and local/universal options. Perfect for network testing, software development, and educational purposes. Featured
WordPress Secret Key Generator - Generate cryptographically secure WordPress security keys and salts for your wp-config.php file. One-click copy, key strength analysis, and step-by-step installation guide.
WPA Key Generator - Generate cryptographically secure WPA/WPA2/WPA3 keys for your wireless network. Create random, uncrackable WiFi passwords with customizable length, character sets, and security strength analysis.
Length Converters
Astronomical Unit Converter - Convert astronomical distances between AU, light-years, parsecs, kilometers, miles, and light-time units. Includes light-travel time, cosmic scale visualization, and real-world distance comparisons (Earth-Moon to Andromeda). New
Cm to Feet and Inches Converter - Convert centimeters to feet and inches instantly with step-by-step calculations, visual height comparison, and quick presets for common heights. Featured
CM to Inches Converter - Instantly convert centimeters (cm) to inches with our free online converter. Includes conversion formula, visual ruler guide, and common conversions. Featured
Feet and Inches to Cm Converter - Convert feet and inches to centimeters instantly with visual height comparison, multi-unit output (cm, meters, total inches), and common height reference examples. Featured
Feet to Meters Converter - Instantly convert feet to meters with visual comparison scale, feet and inches input support, metric breakdown (centimeters/millimeters), and common length reference examples.
Inches to cm Converter - Convert inches to centimeters instantly with interactive visual scale, fractional inch support, multiple output units (cm, mm, m), and real-world size comparisons.
Meters to Feet Converter - Instantly convert meters to feet with visual comparison scale, feet and inches breakdown, fractional inch display, and common length reference examples.
Lookup Tools
Facebook User ID Lookup - Free online tool to find any Facebook user, page, or group numeric ID from a profile URL or username. Essential for developers, marketers, and social media managers. Featured
Instagram User ID Lookup - Free online tool to find the unique numeric ID of any public Instagram account from a profile URL or username. Perfect for developers, marketers, and social media analysts. Featured
MAC Address Lookup - Instantly identify network device manufacturers and vendors by MAC address. Search by full or partial MAC address, or look up MAC prefixes by company name with our comprehensive OUI database. Featured
Trademark Class Finder - New
What is my IP Address? - Instantly discover your public IP address with detailed network information, IPv4/IPv6 detection, one-click copy, and connection details in a beautiful dashboard interface.
Number System Converters
BCD to Binary Converter - Convert BCD (Binary-Coded Decimal) to binary with step-by-step visualization and detailed explanations. Featured
BCD to Decimal Converter - Convert BCD (Binary-coded decimal) to decimal integer with step-by-step visualization and detailed explanations. Featured
BCD to Hex Converter - Convert BCD (Binary-Coded Decimal) to hexadecimal with step-by-step visualization, digit breakdown, and interactive conversion diagrams. Supports packed BCD, unpacked BCD, and multiple input formats. Featured
Binary to BCD Converter - Convert binary numbers to BCD (Binary-Coded Decimal) format with interactive step-by-step visualization, bit mapping diagrams, and detailed conversion explanations. Featured
Binary to Gray Code Converter - Convert a binary number to Gray code with a step-by-step explanation, XOR truth table, and bit-by-bit visualization. Featured
Decimal to BCD Converter - Convert decimal integers to BCD (Binary-Coded Decimal) with step-by-step visual conversion, comparison tables, and detailed explanations. Featured
Gray Code to Binary Converter - Convert gray code to binary number with step-by-step conversion process. See the detailed transformation from Gray code to standard binary representation. Featured
Hex to BCD Converter - Convert hexadecimal (Base-16) numbers to BCD (Binary-Coded Decimal) format with interactive step-by-step visualization, digit mapping diagrams, and comprehensive conversion breakdown. Featured
Occult Calculators
Angel Number Calculator - Discover your angel numbers through recurring numbers or birth date calculation with detailed meanings and spiritual guidance. Featured
Astrological Element Balance Calculator - Featured
Destiny Number Calculator - Calculate your numerology destiny number (life path number) from your birth date with step-by-step reduction, detailed personality insights, and compatibility analysis. Featured
Expression Number Calculator - Calculate your numerology expression number (also called the name number) based on your full name. See your letter-by-letter breakdown, reduction steps, and meaning.
Life Path Number Calculator - Calculate your life path number based on your birth date. Discover your destiny, life purpose, and personality traits with detailed numerology interpretation and step-by-step calculation. Featured
Love Compatibility Calculator - Calculate detailed love compatibility using numerology, zodiac signs, and elemental analysis. Get personalized insights with interactive compatibility gauges, relationship dynamics, and cosmic connection scores. Featured
Master Number Calculator - Calculate your Life Path Number from your birth date and discover Master Numbers (11, 22, 33) with detailed spiritual meanings, calculation breakdown, and numerology insights. Featured
Mercury Retrograde Calendar - Check if Mercury is retrograde now. View complete Mercury retrograde dates, shadow periods, and zodiac signs for any year (1900-2100) with Swiss Ephemeris accuracy. Featured
Moon Sign Calculator - Discover your Moon Sign based on your exact birth time and location. Understand your emotional nature, inner self, and subconscious patterns through accurate astrological calculation.
Name Number Calculator - Calculate your numerology name number based on your full name. Discover the meaning of your name number with detailed step-by-step calculation and interpretation. Featured
New Moon & Full Moon Calendar - Find precise dates and times of all New Moons and Full Moons for any year from 1900 to 2100. Includes zodiac positions, spiritual meanings, and intention guidance for each lunar phase.
Numerology Calculator - Calculate your complete numerology profile including Life Path, Expression (Destiny), Soul Urge, Personality, and Birthday numbers with detailed interpretations and step-by-step calculations.
Personality Number Calculator - Calculate your numerology personality number based on the consonants in your name. Discover how others perceive you with detailed step-by-step calculation and interpretation.
Saturn Return Calculator - Calculate the exact timing of your Saturn Return with precision ephemeris data. Discover your natal Saturn sign, all three return dates, and personalized life themes for this transformative astrological milestone. Featured
Soul Urge Number Calculator - Calculate your numerology Soul Urge (Heart's Desire) Number from the vowels in your full name, with step-by-step breakdown and meaning.
Sun, Moon & Rising Sign Calculator 🌞🌙✨ - Calculate your Sun, Moon, and Rising signs (the astrological Big Three) based on your birth date, time, and location. Get detailed personality interpretations, elemental analysis, and discover how these three placements shape your identity, emotions, and outward personality. Featured
What is my Chinese Zodiac Sign? - Find out what your Chinese zodiac sign is based on your birth date. Discover your zodiac animal, personality traits, lucky numbers, compatible signs, and the meaning behind your Chinese astrological sign.
What is my Lucky Number? - Find out what your lucky number is based on your date of birth using numerology. Discover the meaning of your lucky number with detailed interpretation and personality insights. Featured
What is my Zodiac Sign? - Discover your zodiac sign instantly! Enter your birth date to reveal your astrological sign, personality traits, element, ruling planet, and compatibility with other signs. Featured
Pet Calculators
Bird Cage Size Calculator - Find the minimum recommended cage size, dimensions, and safe bar spacing for your pet bird. Choose your species and how many birds you keep together, and get welfare-based minimum width, depth, and height, a flock-scaled volume, a safe bar-spacing range, and a scaled cage diagram. Supports inches and centimetres with a step-by-step breakdown. New
Cat Calorie Calculator - Calculate your cat's daily calorie needs based on weight, age, activity level, and neutered/spayed status. Uses the veterinary RER formula (70 × weight^0.75) with life-stage multipliers to determine optimal feeding amounts for wet and dry food.
Cat Litter Box Calculator - Find out exactly how many litter boxes your cats need using the vet-recommended "one box per cat, plus one" rule, adjusted for the number of floors in your home. Get a floor-by-floor placement plan, scooping schedule, and a monthly litter usage and cost estimate, with a visual house diagram showing where each box should go. New
Cat Years to Human Years Calculator - Convert your cat's age to human years with accurate life stage analysis, health insights, and visual comparison charts.
Chocolate Toxicity Calculator - Estimate a dog's chocolate toxicity risk from body weight, chocolate type, amount eaten, time since ingestion, and any current symptoms. The calculator converts the chocolate into an estimated methylxanthine dose, shows mg/kg exposure, compares that number with common veterinary screening thresholds, and explains whether the situation is likely low risk, needs prompt veterinary advice, or should be treated as an emergency while you gather wrapper details, recipe context, and the next-step facts a veterinarian or poison hotline will usually ask for. New
Dog Food Calculator - Estimate how much food a dog should eat per day by combining body weight, life stage, activity level, feeding goal, meal frequency, treat allowance, and food-label energy density. Use the result to convert daily calories into cups, cans, or grams, compare the math with the package label, plan per-meal portions, and make smaller evidence-based adjustments for weight loss, maintenance, growth, or recovery.
Dog Life Expectancy Calculator - Estimate a dog's likely total lifespan and remaining years by combining breed baseline, body size, current age, weight condition, activity, preventive care, dental care, neuter status, and chronic health burden. Use it to compare a healthy mixed-breed adult with a senior Labrador or French Bulldog, understand which factors tend to shorten canine longevity, and plan nutrition, screening, exercise, dental follow-up, comfort care, and senior-care conversations with a more realistic range instead of a generic breed average. New
Dog Years to Human Years Calculator - Convert dog years to human years using modern veterinary guidelines. See your dog's equivalent human age, life stage, and health insights based on breed size.
Horse Hay Calculator - Calculate how much hay your horse needs each day based on its body weight and activity level, expressed as a percentage of body weight. See the daily ration in pounds or kilograms, the number of flakes and bales per day, week, and month, an estimated monthly hay cost, and a clear feeding breakdown. Supports imperial and metric units with a step-by-step explanation. New
Pet Insurance Calculator - Estimate whether pet insurance is likely to save money over your pet's remaining lifetime by comparing projected routine care, accident and illness vet bills, premium increases, deductibles, reimbursement rates, and annual payout limits. Use it to model a young dog, indoor cat, or senior pet and see the tradeoff between self-funding and insurance-based risk transfer, including whether coverage mainly saves money, smooths cash-flow shocks, protects against a bad high-claim year, or looks expensive for the expected claims you actually entered. New
Puppy Weight Predictor - Predict a puppy's likely adult weight range by combining breed profile, current age, and current body weight with a size-aware growth curve. Use the estimate to understand likely adult size class, current growth progress, remaining gain, and when the puppy is expected to finish filling out, so feeding targets, crate sizing, harness upgrades, travel setup, and long-term budgeting become easier and less guesswork-driven. New
Raw Feeding Calculator - Calculate a prey-model raw feeding plan from body weight and feeding percentage, then split the daily ration into muscle meat, edible bone, liver, and other secreting organs. Use it to estimate adult maintenance, growth, active-pet, senior, or weight-loss portions, compare classic 80/10/10 feeding with custom ratios, and build a practical weekly shopping list in grams, ounces, kilograms, and pounds. New
Photography Tools
Crop Factor Calculator - Calculate crop factor, 35mm equivalent focal length, angle of view, field of view, and equivalent aperture for full frame, APS-C, Micro Four Thirds, medium format, cinema, and custom sensor sizes. New
Depth of Field (DoF) Calculator - Calculate depth of field (DoF), hyperfocal distance, near/far focus limits, and circle of confusion for any camera and lens combination. Features interactive visualization, real-time aperture comparison, and comprehensive photography calculations.
Exposure Triangle Calculator - Balance ISO, aperture (f-stop), and shutter speed with equivalent exposure settings. Change one exposure triangle value and see the matching settings that preserve the same EV. New
Golden Hour / Blue Hour Calculator - Calculate exact golden hour and blue hour times for any location and date. Get optimal photography lighting windows with stunning visual timeline, sun position animations, and detailed shooting recommendations for photographers.
Megapixel to Print Size Calculator - Calculate the maximum print size from a camera megapixel count, aspect ratio, and DPI. See pixel dimensions, quality grades for standard print sizes (4x6 to 24x36), and viewing-distance recommendations. New
Photo File Size Estimator - Estimate the file size of a photo in JPEG, RAW, TIFF, HEIC, and PNG formats from megapixels, bit depth, and quality. See exactly how many photos fit on your SD card, SSD, or hard drive. New
Physics Calculators
Acceleration Calculator - Calculate acceleration from velocity change and time, force and mass, centripetal motion, or free fall. Get step-by-step solutions, g-force comparisons, and velocity-time graphs. New
Belt Length Calculator - New
Boiling Point Calculator - Calculate the boiling point of water at different altitudes, elevations, or atmospheric pressures using the Clausius-Clapeyron equation. Includes step-by-step solutions and interactive altitude chart. New
Coulomb's Law Calculator - New
Density Calculator - Calculate density from mass and volume, or solve for mass or volume given density. Supports multiple unit systems with step-by-step solutions and material comparisons. New
Electricity Calculator - Calculate voltage, current, resistance, and power using Ohm's Law and Watt's Law. Enter any two known values and instantly solve for the other two with detailed step-by-step formulas.
Engine Compression Ratio Calculator - Calculate an engine's static compression ratio from cylinder bore, stroke, combustion chamber volume, head gasket, piston deck clearance, and piston dome or dish. See an animated piston diagram, per-cylinder and total displacement, a swept-vs-clearance volume breakdown, and a fuel-octane and forced-induction advisory that tells you what gasoline your compression ratio needs. Supports millimeters/cc and inches/cubic-inch units with a full step-by-step formula walkthrough. New
Force Calculator - Calculate force, mass, or acceleration using Newton's second law F=ma. Enter any two values to solve for the third, with unit conversions and real-world force comparisons. New
Free Fall Calculator - Calculate the velocity, distance, and time for objects in free fall under gravity. Supports multiple planets and provides step-by-step solutions with trajectory data. New
Headlight Beam Distance Calculator - Calculate how far your headlight beam reaches down the road from its mounting height and downward aim angle. See the near edge, beam centre, and maximum reach of the lit zone on an animated side-view diagram, plus a glare warning if the aim is too high and a stopping-distance safety check at your driving speed. Supports metric and imperial units with a full step-by-step breakdown. New
Heat Transfer Calculator - New
Horsepower Calculator - Calculate engine horsepower from torque and RPM, or solve for any unknown. Supports Imperial (lb-ft, HP) and Metric (Nm, kW) units with step-by-step solutions and unit conversions. New
Ideal Gas Law Calculator - Calculate pressure, volume, moles, or temperature using the ideal gas law equation PV=nRT. Supports multiple unit systems with step-by-step solutions and automatic unit conversions. New
Kinematics Calculator - Solve one-dimensional kinematics problems using the four kinematic equations. Enter any 3 known variables to find the 2 unknowns with detailed step-by-step solutions.
Kinetic Energy Calculator - Calculate kinetic energy using KE = ½mv². Enter any two values to solve for the third. Supports multiple units with step-by-step solutions and real-world energy comparisons. New
Lens Equation Calculator - New
Momentum Calculator - Calculate linear momentum (p=mv), analyze elastic and inelastic collisions with conservation of momentum, and compute impulse. Step-by-step solutions with collision animation. New
Potential Energy Calculator - Calculate gravitational potential energy (PE = mgh) or elastic potential energy (PE = ½kx²). Supports multiple planets, unit conversions, and detailed step-by-step solutions. New
Pressure Calculator - Calculate pressure from force and area using P=F/A. Supports multiple unit systems (Pa, kPa, bar, atm, psi, mmHg) with step-by-step solutions, unit conversions, and real-world pressure comparisons. New
Projectile Motion Calculator - Calculate projectile range, maximum height, time of flight, and full trajectory from launch angle and initial velocity. Supports custom gravity, initial height, and animated trajectory visualization. New
Pulley System Calculator - Calculate the mechanical advantage, required effort (pull) force, and rope pull distance of a pulley system from the number of supporting rope segments. Includes an animated block-and-tackle diagram, a real-world friction model, and a step-by-step breakdown showing how you trade force for distance. Supports kg, lb, and newton loads with metric or imperial distances. New
Snell's Law Calculator - New
Stopping Distance Calculator - Calculate a vehicle's total stopping distance from its speed, including both the reaction distance and the braking distance, and see how dry, wet, snow, or icy roads change the result. Features an animated braking visualization, a side-by-side comparison of all four road conditions, driver-reaction presets, and a step-by-step physics breakdown. Supports km/h and mph. New
Thermal Expansion Calculator - Calculate the change in length, area, or volume of a material caused by a change in temperature. Pick a material (or enter your own coefficient of thermal expansion), set the start and end temperature, and instantly see the expansion or contraction, the final size, the strain, and an animated diagram of the material growing or shrinking. Supports metric and imperial units with a full step-by-step formula breakdown. New
Torque Calculator - Calculate torque from force and lever arm distance using τ = F × r × sin(θ). Solve for any unknown variable with detailed step-by-step solutions, unit conversions, and real-world torque comparisons. New
Velocity Calculator - Calculate velocity from distance and time. Supports average velocity, relative velocity, angular to linear conversion, and instant unit conversions between m/s, km/h, mph, ft/s, and knots. New
Work and Power Calculator - Calculate work done by a force (W = Fd cosθ) and mechanical power (P = W/t). Supports multiple units, angle input, and provides step-by-step solutions with energy comparisons. New
Pressure Converters
Bar to PSI Converter - Convert pressure between bar and psi (pounds per square inch) with visual gauge, common presets, and multi-unit results.
kPa to psi Converter - Convert kPa (kilopascals) to psi (pounds per square inch) instantly. Free online pressure unit converter with conversion formula, reference chart, and common pressure examples.
PSI to Bar Converter - Convert between PSI (pounds per square inch) and Bar pressure units instantly. Features bidirectional conversion, visual pressure gauge, common presets for tires, SCUBA, and industrial applications, plus multi-unit comparison table.
psi to kPa Converter - Convert psi (pounds per square inch) to kPa (kilopascals) instantly. Free online pressure unit converter with conversion formula, reference chart, and common pressure examples.
Student Calculators
Final Grade Calculator - Calculate the exact score you need on your final exam to achieve your target grade. Supports simple and weighted category modes with what-if scenario analysis. New
GPA Calculator - Calculate your GPA (Grade Point Average) with course credits and grades. Supports US 4.0 scale, plus/minus grades, weighted GPA, and multiple grading systems.
Grade Calculator - Calculate your overall course grade from individual assignments, exams, and projects with customizable weights and grading scales. Find out what score you need on remaining assessments to reach your target grade. New
Study Timer (Pomodoro) - Plan and track study sessions using the Pomodoro technique with customizable work/break intervals, visual countdown timer, and detailed session scheduling. New
Test Score Calculator - Convert raw test scores to percentages, letter grades, and GPA equivalents. Supports customizable grading scales, batch score entry, and detailed performance analysis. New
Weighted Grade Calculator - Calculate your weighted grade by entering category weights and scores for homework, quizzes, exams, projects, and more. See weight distribution, letter grade, and step-by-step calculation breakdown. New
Unit Converters
Angle Converter - Convert angles between degrees, radians, gradians, turns, arcminutes, arcseconds, and milliradians instantly with a visual protractor diagram and DMS notation support.
Clothing Size Converter - Convert clothing sizes between US, UK, EU, France, Italy, Japan, Korea, international alpha sizes, and body measurements. Includes women's clothing, men's tops and jackets, jeans waist sizes, visual size rails, and fit notes. New
Energy Converter - Instantly convert between 12+ energy units including Joules, Calories, BTU, kWh, eV, and more. Features real-time conversion, practical examples, and scientific notation support.
File Size Converter - Convert file sizes between all units (Bits, Bytes, KB, MB, GB, TB, PB) with binary (1024) and decimal (1000) standards. Includes visual size comparisons and instant all-unit conversion. Featured
Fuel Efficiency Converter - Convert fuel economy between MPG (US & Imperial), L/100km, km/L and mi/L instantly. Includes vehicle benchmarks, efficiency rating, tank range projection and CO2 estimate. New
kg to lbs Converter - Convert kilograms (kg) to pounds (lbs) and vice versa with step-by-step calculations, weight breakdowns in ounces, and real-world weight comparisons.
Lbs to Kg Converter - Convert pounds (lbs) to kilograms (kg) with our easy-to-use weight conversion calculator. Get accurate conversions with visual representations and detailed explanations. Featured
Length Converter - Convert between length units instantly: meters, centimeters, millimeters, kilometers, feet, inches, yards, miles, and nautical miles. Features real-world comparisons and visual scale.
Percent to PPM Converter - Free online tool to convert between percent (%) and parts per million (ppm) with instant results, visual scale diagram, and common conversion reference table.
Power Converter - Instantly convert power between Watts, Kilowatts, Megawatts, Horsepower (mechanical & metric), BTU/h, Ton of Refrigeration, and Foot-Pound per Second with visual scale comparison.
PPM to Percent Converter - Convert ppm (parts-per-million) to percentage with visual scale, real-world examples, and detailed explanations.
Pressure Converter - Instantly convert pressure between Pascals (Pa), Kilopascals (kPa), Megapascals (MPa), Bar, Millibar (mbar), PSI, Atmospheres (atm), Torr, and kgf/cm² with visual gauge and quick presets.
Ring Size Converter - Convert ring sizes instantly between US, UK, EU/ISO, Japan, China, plus diameter and circumference in millimeters. Includes a true-size visual ring, screen calibration, and a string-method measurement helper. New
Scale Model Conversion Calculator - Convert measurements between different scale model ratios (1:72, 1:35, 1:24, etc.) and real-world dimensions. Perfect for hobbyists building aircraft, vehicles, ships, architectural models, and miniatures. Features visual scale comparison, common scale presets, and bidirectional conversion.
Shoe Size Converter - Instantly convert shoe sizes between US, UK, EU, Japan (Mondopoint), Mexico, Brazil, and Korea. Supports men's, women's, and children's sizes with foot measurement guide.
Speed Converter - Instantly convert speed between Meters per Second, Kilometers per Hour, Miles per Hour, Feet per Second, Knots, Mach Number, and Speed of Light with interactive speedometer visualization and real-time comparisons.
Temperature Converter - Convert temperature between Celsius (°C), Fahrenheit (°F), Kelvin (K), Rankine (°R), and Réaumur (°Ré) with visual thermometer display, reference points, and detailed conversion formulas.
Torque Converter (Nm, ft-lb, kgf-cm) - Convert torque between Newton-meters (N·m), foot-pounds (ft-lb), inch-pounds (in-lb), kilogram-force centimeters (kgf·cm), kilogram-force meters (kgf·m), and dyne-centimeters. Includes real-world torque references for car wheels, bike pedals, and fasteners, plus a visual force × radius diagram. New
Ultimate Frequency & Wavelength Converter - Convert between frequency and wavelength across the electromagnetic spectrum with interactive visualization, step-by-step calculations, and support for custom propagation speeds.
Volume Converter - Convert volume instantly between Liters, Milliliters, Cubic Meters, US Gallons, Quarts, Pints, Cups, Fluid Ounces, Tablespoons, Teaspoons, Cubic Feet, and Cubic Inches with visual comparison.
Weight (Mass) Converter - Instantly convert weight between Kilograms, Grams, Milligrams, Pounds, Ounces, Stones, Metric Tons, Short Tons, Long Tons, Carats, and Micrograms with real-time updates and visual object comparisons.
Video Tools
Add or Replace Audio in Video - Easily add new audio to your video (mixing with original sound) or completely replace the video's existing audio. Keeps original video length. Option to loop shorter audio. Adjust added audio volume in dB.
Add Watermark to Video - Easily add a text or image watermark to your videos online. Customize position, size, font, and color. No uploads required.
Adjust Video Speed - Easily change video playback speed (slow motion or fast forward) online. Supports 0.25x to 4.0x speed adjustment. Free, client-side processing. Featured
Flip Video - Easily flip your videos horizontally (mirror) or vertically online without uploading. Free, fast, and secure. Featured
FPS Converter - Easily change the frame rate (FPS) of your videos online. Supports presets and custom FPS. Free, fast, and client-side processing. Featured
GIF to MP4 Converter - Convert your animated GIFs into MP4 videos directly in your browser. Customize quality, size (dimensions/scale), preview, and download instantly. Fast, free, and private.
Loop Video - Easily loop your videos a specified number of times. Processes in your browser, no uploads. Free and secure.
Merge Videos - Combine multiple video files into a single video online. Client-side merging, reorder videos before merging. Free and secure. Featured
MP4 to GIF Converter - Convert your MP4 videos into animated GIFs directly in your browser. Customize size, FPS, and preview instantly.
Random Video Thumbnail Generator - Generate random thumbnails from uploaded videos.
Remove Audio from Video - Easily remove the audio track (mute) from your video files online. Keeps video quality. Client-side processing. Featured
Reverse Video - Easily reverse short video clips online (best under 20s). Optionally select start/end times. Processed in your browser. Featured
Rotate Video - Easily rotate your videos 90, 180, or 270 degrees clockwise or counter-clockwise online without uploading. Free, fast, and secure.
Video Bitrate Calculator - New
Video Compressor - Compress video files online directly in your browser. Reduce video size with adjustable quality settings. Free, secure, and no uploads required. Featured
Video Cropper - Crop your videos online directly in your browser. Draw a rectangle to select the area, preview, and download.
Video Splitter - Easily split a segment from your video online without uploading. Select start and end times visually. Free, fast, and secure. Featured
Video to Image Extractor - Extract single or multiple image frames from your videos online. Select time, interval, and format (PNG, JPG, WEBP). Featured
Volume Converters
Cups to Gallons Converter - Convert between US cups and gallons with a visual conversion chart, instant bidirectional calculator, step-by-step formula, and a full reference table for common cooking and baking measurements.
Cups to Liters Converter - Convert US cups to liters instantly with visual measuring cup reference, common cooking conversions, and bidirectional conversion. Perfect for recipes and cooking measurements.
Cups to Ounces Converter - Convert cups to ounces with support for US, Imperial, and Metric cup standards. Includes visual diagrams, quick reference tables, and ingredient weight conversions for cooking.
Cups to Quarts Converter - Convert between US cups and US quarts with a visual quart-fill diagram, bidirectional converter, step-by-step formula, multi-unit conversion panel, and a comprehensive cooking reference table.
Cups to Tablespoons Converter - Convert cups to tablespoons and tablespoons to cups instantly. Features bidirectional conversion, visual measuring guide, common recipe measurements, ingredient-specific conversions, and fractional results for easy cooking and baking.
Cups to Teaspoons Converter - Convert cups to teaspoons and teaspoons to cups instantly. Features bidirectional conversion, visual measuring guide, common recipe conversions, and fractional results for easy cooking.
Gallons to Cups Converter - Convert US gallons to cups instantly with visual representations, bidirectional conversion, and complete volume breakdown including quarts and pints.
Liters to Cups Converter - Convert liters to cups instantly. Supports US customary cups, metric cups (250 mL), and Imperial cups with precise calculations and a visual converter.
Ounces to Cups Converter - Convert fluid ounces to cups and cups to ounces instantly. Features bidirectional conversion, visual measurement guide, common conversions reference table, and detailed step-by-step calculations for cooking and baking.
Quarts to Cups Converter - Convert quarts to cups instantly with visual measuring guides, bidirectional conversion, multiple measurement systems (US, UK, Metric), common cooking conversions, and step-by-step calculations.
Tablespoons to Cups Converter - Convert tablespoons to cups and cups to tablespoons instantly. Supports US, Metric, and Imperial measurements with visual fill-level diagrams.
Tablespoons to Teaspoons Converter - Convert tablespoons to teaspoons and teaspoons to tablespoons with visual spoon diagrams, step-by-step calculations, and a quick reference table for common recipe measurements.
Teaspoons to Cups Converter - Convert teaspoons to cups and cups to teaspoons instantly. Features bi-directional conversion, visual measuring guides, common recipe presets, and a complete reference table for cooking and baking.
Teaspoons to Tablespoons Converter - Convert teaspoons to tablespoons and vice versa with visual spoon representations, batch conversion for recipes, and a comprehensive quick reference chart. Supports US, metric, and UK measurement systems.
Weight Converters
Grams to Ounces Converter - Convert grams to ounces (oz) instantly with an interactive balance scale visualization, step-by-step calculations, common weight references, and a comprehensive conversion table.
Grams to Pounds Converter - Convert grams to pounds instantly with visual weight scale, real-world comparisons, bidirectional conversion, and interactive conversion tables for cooking, shipping, and everyday weight measurements.
Ounce to Gram Converter - Convert ounces to grams instantly with visual weight scale, common conversions table, precision control, and step-by-step calculation breakdown.
Pounds to Grams Converter - Convert pounds to grams instantly with an interactive visual scale, common weight references, and detailed conversion tables. Features bidirectional conversion with real-world examples like food portions and everyday objects.
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