Health and Fitness
Fertility Calculators
Conception Date Calculator - Calculate your estimated conception date, fertile window, and due date based on your last menstrual period. Get a detailed pregnancy timeline with week-by-week milestones and ovulation tracking.
Fertility Calculator - Calculate your most fertile days, predict ovulation dates, and track your menstrual cycle with our comprehensive fertility calculator. Get personalized fertility windows and estimated due dates.
Menstrual Cycle Calculator - Predict your future menstrual cycles, track fertility windows, and estimate ovulation dates with our comprehensive cycle calculator featuring visual phase timelines.
Menstrual Cycle Length Calculator - Calculate your menstrual cycle length, predict your next period, estimate fertile window and ovulation day based on your last two period start dates.
Ovulation Calculator - Free ovulation calculator and fertility calendar to find your most fertile days, predict ovulation date, and estimate due date if pregnant. Plan conception with visual cycle tracking.
Ovulation Calendar - Create your personal ovulation calendar to track fertile days, predict ovulation, and plan pregnancy with our beautiful visual fertility tracker.
Ovulation Predictor - Predict your ovulation date and most fertile days with a visual fertility calendar, cycle phase breakdown, and 6-cycle forecast based on your menstrual cycle data.
Fitness Calculators
ACFT Score Calculator - Calculate your Army Combat Fitness Test (ACFT) score for all six events — 3-Rep Max Deadlift, Standing Power Throw, Hand-Release Push-Up, Sprint-Drag-Carry, Plank, and Two-Mile Run. Enter your raw performances and instantly see your points per event (0–100), your total out of 600, pass/fail against the 60-point minimums, and a visual hexagon radar chart that pinpoints your strongest and weakest events. Scores are age- and gender-normed across all 10 age brackets.
AI Workout Plan Generator - Free AI-powered workout plan generator that builds a personalized weekly training split from your goal, available equipment, experience level, and schedule. Get a day-by-day routine with exact sets, reps, rest, target muscles, and progression tips. New
Army Body Fat Calculator - Estimate body fat percentage using the official US Army tape-test method with neck, waist, and hip circumference measurements per AR 600-9.
Backpack Size Calculator - Find the right backpack size from your torso length and trip length. This calculator gives you two answers most tools miss: the correct frame/harness size (XS, S, M or L from your measured torso length) and the recommended pack volume in liters, adjusted for how many nights you are out, your packing style, and the season. Includes a torso measurement guide, an animated pack-volume visual, imperial and metric units, and a step-by-step breakdown.
Beep Test Calculator - Turn your beep test (20m multi-stage fitness test / bleep test) result into an estimated VO2 max using the Léger equation. Enter the level and shuttle you reached plus your age and gender to see your VO2 max, an age- and gender-based fitness rating, the speed you hit, total shuttles, distance covered, and time on your feet — with an animated shuttle track and a step-by-step breakdown.
Bench Press Calculator - Calculate your one-rep maximum (1RM) for bench press using Brzycki, Epley, or Lander formulas. Get personalized training zones, percentage charts, and strength level assessment.
Bike Gear Ratio Calculator - Calculate your bicycle gear ratio, gear inches, development (rollout), and gain ratio from your chainring and cog teeth, then see your speed at any cadence and wheel size. Includes an animated gear visualization, a speed-vs-cadence chart, gear classification, and a full step-by-step breakdown. New
Bike Size Calculator - Find your correct bike frame size from your height and inseam for road, mountain, and hybrid bikes. This calculator combines the accurate inseam formula with a height-based size chart, cross-checks the two for confidence, and also recommends your ideal saddle height and standover clearance. See your fit on an animated bicycle diagram and a size gauge, with a full step-by-step breakdown in metric or imperial units.
BMR Calculator - Calculate your BMR (basal metabolic rate) and RMR (resting metabolic rate) plus daily calorie needs with the Mifflin-St Jeor and Harris-Benedict equations. Includes TDEE, activity-level breakdown, macronutrient estimates, and a step-by-step formula walkthrough.
Body Fat Percentage Calculator - Calculate your body fat percentage using the US Navy Method with visual body composition breakdown, fitness category assessment, and personalized health recommendations.
Body Recomposition Calculator - Plan calorie and macro targets for simultaneous fat loss and muscle gain. Get a personalized Recomp Feasibility Score, training-day vs rest-day calorie cycling schedule, protein-prioritized macros, and 12 / 24 / 52 week fat-loss and muscle-gain projections based on your training experience. New
Boxing Punch Power Calculator - Estimate your punch force, impact energy, and power output from your body weight, fist speed, and effective striking mass. The Boxing Punch Power Calculator turns the physics of a punch (impulse, momentum, and kinetic energy) into clear numbers — impact force in newtons and pounds, energy in joules, and power in watts and horsepower — then rates your punch on a visual power gauge and compares it to amateur and professional benchmarks. Supports metric and imperial units with a full step-by-step breakdown. New
Calorie Burned Calculator - Calculate calories burned during 50+ activities with MET values, personalized insights, food equivalents, and interactive visualization. Supports metric and imperial units.
Calorie Deficit Calculator - Calculate your personalized calorie deficit, TDEE, and BMR to create an effective weight loss plan with meal suggestions and progress tracking.
Cooper 12-Minute Run Calculator - Estimate your VO2 Max from the Cooper 12-minute run test. Get your official Cooper fitness rating by age and gender, see your distance on an animated 400 m track, and predict your 1-mile, 5K and 10K race times. New
Cycling Speed Calculator - Calculate your cycling average speed, ride time, or distance. Get pace per km/mile, cycling zone classification, calorie estimates, and comparisons with different riding styles.
FFMI Calculator - Calculate your FFMI (Fat-Free Mass Index) and adjusted FFMI from your weight, height, and body fat percentage. See how your muscle mass compares on a visual gauge, how close you are to your natural muscular limit, and how much lean mass you have left to gain. Supports metric and imperial units with a step-by-step breakdown. New
FTP & Power Zones Calculator - Calculate your cycling FTP (Functional Threshold Power) from a 20-minute test, 8-minute test, ramp test, or a known FTP, then get your 7 Coggan power training zones in watts. See your watts-per-kilogram, your rider category on a visual gauge, and a full color-coded zone spectrum with target power ranges, training focus, and how each zone should feel. Supports metric and imperial weight with a step-by-step breakdown.
Heart Rate Recovery Calculator - Calculate your Heart Rate Recovery (HRR) — the drop in your heart rate one minute after peak exercise. Enter your peak heart rate and your heart rate after 1 minute of recovery to get your HRR score, a fitness-level rating on a visual gauge, an animated heart-rate recovery curve, and a clinical normal/abnormal reading based on your recovery protocol. Optionally add your age to see your percentage of maximum heart rate.
Helmet Size Calculator - Find your correct helmet size from your head circumference for cycling, motorcycle, ski and snowboard, skateboard, climbing, equestrian, baseball, and hockey helmets. Enter your measurement in centimeters or inches to get your recommended letter size (XS-2XL), a visual sizing gauge, a snugness fit meter, a cross-sport size comparison, and your hat size. Supports metric and imperial with a step-by-step measuring guide.
Hiking Pace Calculator (Naismith's Rule) - Estimate hiking time from distance and elevation gain using Naismith's Rule. Add route surface, pack weight, descent notes, and rest allowance to turn the classic baseline into a practical trail-time plan with a visual elevation profile and step-by-step breakdown. New
Hiking Time Calculator - Estimate how long a hike will take with Naismith's rule plus real-world refinements. Enter trail distance and elevation gain and this calculator adds Langmuir descent corrections, a fitness/pace factor, pack-load penalty and rest breaks to give a total hiking time, arrival ETA, average speed and a difficulty rating. Includes an animated elevation profile, a time-breakdown chart and a step-by-step Naismith walkthrough in metric or imperial units.
Hydration Calculator - Calculate exactly how much water and electrolytes you need before, during, and after a workout. Pick an activity, duration, body weight, intensity, and environment, or measure your real sweat rate by weighing yourself before and after. Returns a minute-by-minute drinking schedule, sodium target, dehydration risk gauge, animated sweat-loss visual, and bottle-count guidance for any session length. New
Lean Body Mass to Strength Calculator - Predict your strength potential from lean body mass instead of total bodyweight, because muscle produces force and fat does not. Get predicted 1RMs for the squat, bench, deadlift, and overhead press, a strength-to-lean-mass ratio for each lift, FFMI, and an optional Muscle Efficiency score that reveals how much of your muscle's force potential you have actually realized. New
Marathon Pace Calculator - Plan your marathon or half-marathon with target pace, mile/km splits, pacing strategies (negative, positive, even), equivalent race times, and wall prediction.
Max Heart Rate Calculator - Calculate your maximum heart rate using 6 scientifically-validated formulas including Tanaka, Gulati, and traditional methods. Get personalized training zones for optimal workout intensity.
One-Mile Walk Test (Rockport) Calculator - Estimate your VO2max and cardiovascular fitness with the Rockport One-Mile Walk Test. Just walk one mile, enter your time and ending heart rate, and get your VO2max, fitness category, fitness age, walking pace, and calories burned with an animated walk-track visualization. New
One Rep Max (1RM) Calculator - Calculate your one-rep maximum (1RM) using 7 scientific formulas. Get training zone percentages, warm-up sets, and visualize your strength potential for any exercise.
Pace to Calories Calculator - Convert a running, walking, hiking, or treadmill pace into calories burned using ACSM physiological equations. Enter pace as MM:SS per mile or kilometer, pick distance or duration, optionally add an incline, and instantly see total calories, net vs gross burn, pace-zone classification, equivalent foods, and an animated runner that moves at your pace. New
Pace Zone Calculator - Calculate your personalized training pace zones based on a recent race result using the Jack Daniels VDOT method. Get Easy, Marathon, Threshold, Interval, and Repetition zone paces with targeted workout suggestions.
Protein Intake Calculator - Calculate your optimal daily protein intake based on body weight, fitness goals, and activity level. Get personalized recommendations with per-meal breakdowns, food source suggestions, and evidence-based protein guidelines.
Race Time Predictor - Predict your 5K, 10K, 10-mile, half marathon, and marathon finish times from a single recent race result using Riegel's endurance formula. See every predicted time and pace on an animated race-lane chart, switch between min/km and min/mile, fine-tune the fatigue factor, and follow a full step-by-step breakdown. New
Rowing Pace Calculator - Convert between /500m split, watts, speed, and calories for indoor rowing (erg) workouts. Enter your split, your power, or a distance and time, and instantly see every equivalent, projected finish times for 2k, 5k, 10k, half and full marathon, an animated stroke, and a pace-class gauge. Works with the Concept2 power formula.
Running Age-Grading Calculator - Calculate your running age-grade percentage for any race time. The age-grading calculator compares your finish time against the world standard for your exact age and sex, so runners of any age and distance can be compared fairly. See your age-graded (open-equivalent) time, your performance level from recreational to world record, an animated performance gauge, an age-factor decline curve, and the equivalent times you could run at other ages to hold the same age-grade. Supports the mile, 5K, 10K, half marathon and marathon with a step-by-step breakdown.
Running Pace Calculator - Calculate your running pace, finish time, or distance. Features pace zone classification, speed conversion, projected race times, and training tips for 5K, 10K, Half Marathon, Marathon, and Ultra distances.
Ski Size Calculator - Find the correct ski length for your height, weight, skill level, and ski type. This ski size calculator gives a personalized recommended length and range in cm and inches, shows where the ski reaches on your body with a true-to-scale diagram, and explains the nimble-vs-stable tradeoff on a visual length gauge with a full step-by-step breakdown. Supports metric and imperial units.
Snowboard Size Calculator - Find your ideal snowboard length and width from your weight, height, boot size, riding style, and ability level. See your recommended board length on a visual length gauge, check the classic chin-to-nose height rule with a to-scale rider diagram, and measure boot overhang against the board waist width to know whether you need a wide board. Supports metric and imperial units with a full step-by-step breakdown.
Steps to Distance Calculator - Convert your walking or running steps into miles or kilometers. Estimate stride length from your height and gender, calculate distance covered, calories burned, and time spent walking. Perfect for tracking fitness goals like 10,000 steps a day.
Strength Standards Calculator - Estimate your one-rep max and compare your squat, bench press, deadlift, and overhead press against practical strength standards based on bodyweight.
Surfboard Volume Calculator - Find the ideal surfboard volume in liters for your body weight, surfing skill level, and fitness. This calculator gives you a recommended volume range, places it on a personalized float gauge, suggests matching board types (foamie, funboard, fish, shortboard), and shows how much buoyancy your board provides. Supports kilograms and pounds with a full step-by-step breakdown.
Swimming Pace Calculator - Calculate your swimming pace per 100m, lap splits, and estimated race times. Supports freestyle, backstroke, breaststroke, butterfly for pool and open water.
Swimming SWOLF Calculator - Calculate your swimming SWOLF score by adding your stroke count and time per pool length. SWOLF ("swim golf") measures stroke efficiency — the lower the score, the more economical your swimming. Get your raw score, a 25 m-normalized score for fair cross-pool comparison, an efficiency-rating gauge tuned to your stroke, distance per stroke, stroke rate, pace per 100, a stroke-vs-time breakdown, and step-by-step improvement tips. Works for any pool length in meters or yards. New
Target Heart Rate Calculator - Calculate your target heart rate zones using the Karvonen method. Find your optimal training zones for fat burning, cardio, and peak performance with personalized heart rate targets.
TDEE Calculator - Calculate your TDEE, BMR, BMI with multiple formulas (Mifflin-St Jeor, Harris-Benedict, Katch-McArdle). Get personalized macro recommendations and visualize your calorie breakdown.
Triathlon Pace Calculator - Plan swim, bike, and run paces for triathlon races including Sprint, Olympic, Half Ironman, and Ironman distances with transition time estimates.
Vertical Jump Calculator - Calculate your vertical jump height from standing and jump reach measurements. Get performance ratings, estimated power output (Lewis & Harman formulas), sport-specific comparisons, and personalized training tips. Featured
VO2 Max Calculator - Calculate your VO2 Max using the Cooper 12-minute run test. Get personalized fitness assessment, training recommendations, and compare your cardiovascular fitness to age and gender norms.
Weight Loss Calculator - Estimate how long it will take to reach your goal weight based on your calorie deficit and activity level. Uses adaptive TDEE recalculation as you lose weight, compares multiple deficit strategies, and shows a week-by-week projection with milestones. Featured
Wilks & DOTS Calculator - Calculate your Wilks, Wilks-2 (2020) and DOTS powerlifting scores from your bodyweight and total. See all three coefficient systems side by side, place your DOTS score on a strength-level gauge, and use the interactive bodyweight-equivalence curve to see exactly what total you would need at any other bodyweight to match your score. Supports kilograms and pounds, squat/bench/deadlift breakdown, and a full step-by-step formula walkthrough.
Yoga Pose Hold Timer - Build a sequenced yoga timer with your own poses, per-pose hold durations, and transitions between them. See your total session length, a visual flow timeline, estimated breaths and calories burned, then run a hands-free guided timer with a breathing animation, audio cues, and next-pose previews. Includes ready-made flows (Sun Salutation, Morning Energizer, Bedtime Relax, Balance & Core) and works on mobile and desktop. New
Health Calculators
AI Meal Plan Generator - Free AI meal plan generator that builds a personalized 7-day meal plan from your diet type, daily calorie target, meals per day, and food preferences. Get per-day calorie and macro breakdowns plus an auto-generated weekly grocery shopping list. New
Alcohol Calorie Calculator - Build a real drinking session from beers, wines, spirits, and cocktails and see total calories, alcohol-vs-mixer breakdown, exercise minutes to burn it off, food equivalents, standard-drinks count, and projected weekly and annual weight impact. Includes 21 preset drinks plus a custom-drink builder. New
Baby Eye Color Predictor - Predict your baby's eye color probabilities (brown, green, and blue) from the eye colors of both parents, and optionally the grandparents, using a genetics-based two-gene inheritance model. See the odds on animated iris visuals, an interactive Punnett square, and a clear step-by-step breakdown of how dominant and recessive eye-color genes combine.
Baby Growth Percentile Calculator - Track your baby's height, weight, and head circumference against WHO growth standards. Get instant percentile rankings with visual growth charts for boys and girls aged 0-24 months.
Baby Milk Intake Calculator - Estimate how much milk your baby needs each day and per bottle, based on age and weight. This baby milk intake calculator shows a healthy daily range (not just one number), the amount per feed, and a clear 24-hour feeding schedule with bottle times. It supports formula and pumped breast milk in metric or imperial units, displays results in millilitres or fluid ounces, and includes safety guidance such as the recommended formula ceiling and reminders for breastfed and solid-food stages.
BAC Calculator - Calculate your estimated blood alcohol content (BAC) based on drinks consumed, body weight, gender, and time elapsed using the Widmark formula.
Biological Age Calculator - Estimate your biological age based on lifestyle, health metrics, and habits. Compare your body's functional age to your chronological age across 4 health dimensions with personalized improvement recommendations.
Blood Donation Time Calculator - Calculate your next eligible blood donation date based on donation type. Track whole blood, plasma, platelet, and double red cell donations with personalized countdown and eligibility guidelines.
Blood Pressure Interpreter - Interpret your blood pressure reading against AHA/ACC 2017 clinical categories. Get your BP classification, pulse pressure, mean arterial pressure (MAP), and personalized health insights with an animated visual gauge.
Blood Sugar Converter - Convert blood sugar levels between mg/dL (US) and mmol/L (UK/International) with instant results, diabetes risk assessment, visual range indicators, and comprehensive glucose reference charts.
Caffeine Half-Life Tracker - Track how much caffeine is still in your body hour by hour. Add each coffee, tea, or energy drink with its time, and the tracker uses caffeine's half-life to plot a decay curve, show your peak level, estimate how much caffeine remains at bedtime, and tell you when you are clear to sleep. Adjustable half-life for fast and slow metabolizers, daily 400 mg limit check, and a full hourly breakdown. New
Caffeine Overdose Calculator - Calculate your safe daily caffeine limit based on body weight, then see the equivalent in espresso shots, cups of coffee, energy drinks (Monster, Red Bull), tea, and more. Includes animated drink visualizations and a danger zone meter. Featured
Carb-to-Insulin Ratio Calculator - Free Carb-to-Insulin Ratio Calculator: use the 500 or 450 rule to find how many grams of carbohydrate one unit of insulin covers, compare rules, see units needed for common foods, and estimate a mealtime bolus dose from your total daily insulin dose (TDD). New
Carbohydrate Calculator - Calculate your optimal daily carbohydrate intake based on your caloric needs, activity level, body metrics, and diet goals. Get a personalized carb breakdown with fiber, sugar limits, meal timing, and food source recommendations.
Child BMI Percentile Calculator - Calculate your child's BMI and CDC BMI-for-age percentile for ages 2 to 20. Enter your child's sex, age, height, and weight to see their exact percentile on the official CDC growth chart, their weight-status category (underweight, healthy weight, overweight, or obese), and the healthy weight range for their age and height. Includes an interactive CDC percentile growth curve, a clear percentile gauge, and a full step-by-step breakdown in both metric and imperial units.
Child Height Predictor - Predict your child's adult height from the parents' heights using the mid-parental height method. See the predicted height with its 95% range on a visual height ruler, compare your child against mum and dad with scaled family figures, and find out what adult-height percentile the prediction falls into. Supports metric (cm) and imperial (ft/in) units with a clear step-by-step breakdown.
Coffee vs. Sleep Calculator - Compare the alertness boost from coffee versus a power nap. See peak alertness timing, caffeine crash window, and which option gives you better sustained focus based on sleep science and caffeine pharmacokinetics.
Diaper Size Calculator - Find the right diaper size for your baby by weight and age, see exactly where your baby sits inside the size range, and check whether it is time to size up. The Diaper Size Calculator recommends a primary size plus the overlapping alternate, projects how many weeks until the next size, and estimates how many diapers you will use per day, week, and month — with an optional cost estimate. Supports pounds and kilograms with a clear visual size ladder and a step-by-step breakdown.
How Much Water to Drink A Day? - Calculate your personalized daily water intake based on weight, activity level, climate, and health factors. Get a visual hydration plan with hourly schedule and tips.
How Much Weight Should I Lose? - Find out how much weight you should lose based on BMI analysis, get a safe weight loss timeline, calorie deficit plan, and personalized milestones to reach your healthy weight range.
Insulin Sensitivity Factor Calculator - Free Insulin Sensitivity Factor (ISF) Calculator: use the 1500, 1700, 1800, or 2000 rule to find how much one unit of insulin lowers your blood glucose, compare the rules side by side, and estimate an optional correction dose in mg/dL or mmol/L from your total daily dose (TDD). New
Intermittent Fasting Calculator - Plan your intermittent fasting schedule with visual fasting and eating windows. Supports 16:8, 18:6, 20:4, OMAD, and custom protocols with a body process timeline.
Jet Lag Calculator - Estimate jet lag recovery time from origin and destination time zones, travel direction, and flight time. Get personalized sleep, light exposure, meal timing, and arrival-day adjustment tips. New
Keto Calculator - Calculate your personalized keto macros for fat, protein, and net carbs. Get daily calorie targets, macro ratios, and meal planning insights tailored to your body composition, activity level, and ketosis goals.
Life Expectancy Calculator - Estimate your life expectancy based on age, gender, lifestyle habits, and health factors. See how smoking, exercise, diet, sleep, and stress affect your projected lifespan with visual breakdowns and personalized improvement tips.
Macro Calculator - Calculate Your Daily Macros for Any Goal - Calculate your optimal daily macronutrient needs with our advanced macro calculator. Get personalized protein, carbs, and fat targets based on your body, activity level, and fitness goals.
Medication Dosage Calculator - Calculate medication dosage three ways: by body weight (mg/kg), by age (Clark's, Young's, and Fried's Rule), or by body surface area (Mosteller BSA formula). Includes a 14-medication preset library, mg-to-ml liquid conversion, dosing schedule with max-daily-dose safety check, and side-by-side method comparison. New
Nap Calculator - Find the perfect nap length and the exact time to set your alarm so you wake up refreshed instead of groggy. The Nap Calculator maps your nap onto real sleep stages, shows a visual hypnogram with the "grogginess zone" to avoid, and works both ways: enter when you will lie down to get your wake-up times, or enter when you need to be awake to get your latest fall-asleep time. Includes power naps, recovery naps, slow-wave naps, and full 90-minute sleep cycles, plus a coffee-nap tip. New
Net Carbs Calculator - Compute net carbs by subtracting dietary fiber and sugar alcohols from total carbohydrates. Supports different sugar alcohol types with accurate glycemic impact factors, daily keto budget tracking, and a visual carb waterfall breakdown.
Recipe Nutrition Calculator - Calculate the total calories, protein, fat, carbohydrates, and fiber from your recipe's ingredient list. Get per-serving nutrition facts, a macro breakdown chart, and daily value percentages.
Sleep Calculator - Calculate optimal sleep and wake times based on 90-minute sleep cycles. Get personalized recommendations for your age group and track sleep debt.
Standard Drink Calculator - Convert any drink into standard alcohol units from its volume and ABV. Supports regional definitions (US 14g, UK 10mL units, Australia 10g, Canada 13.6g, Europe/WHO 10g) so you can compare beer, wine, spirits, and cocktails on the same scale. See pure alcohol grams, alcohol calories, an animated drink-unit visual, a side-by-side country comparison, and a step-by-step breakdown. New
Water Intake Calculator - Calculate your personalized daily water intake based on body weight, activity level, and climate. Get a visual glass tracker and hourly drinking schedule.
Health Indicator Calculators
Am I Overweight? - Calculate your BMI (Body Mass Index) to find out if you are underweight, normal weight, overweight, or obese. Get personalized health insights, ideal weight range, and step-by-step calculation.
Am I Underweight? - Find out if you are underweight based on BMI calculation with visual health indicators, personalized insights, and actionable recommendations.
BMI Calculator - Calculate your BMI (Body Mass Index) with interactive gauge visualization, health category assessment, BMI Prime, healthy weight range, and step-by-step calculation breakdown.
Body Type Calculator - Calculate your body frame size (small, medium, or large) based on wrist circumference, height, and gender. Uses the height-to-wrist ratio (r-value) method and direct wrist measurement for dual verification. Includes frame-adjusted ideal weight ranges, visual body frame comparison, and personalized health insights.
👙 Bra Size Calculator - Determine your correct bra size from band and bust measurements. Get results in US, UK, EU, French, Italian, and Australian sizing systems with sister sizes and fit tips. New
Height Percentile Calculator - Find where your height falls on the population distribution. Calculate your exact percentile rank compared to others of the same age and gender using CDC growth chart and NHANES survey data. Featured
How Much Should I Weigh? - Calculate your ideal body weight using 5 scientific formulas (Devine, Robinson, Miller, Hamwi, Peterson). Compare results with a visual weight spectrum, BMI analysis, body frame adjustment, and personalized health insights.
Ideal Weight Calculator - Calculate your ideal body weight using four clinically-recognized formulas: Devine, Robinson, Miller, and Hamwi. Compare results side-by-side, see healthy BMI weight range, and get personalized insights based on your height, gender, and age.
Lean Body Mass Calculator - Calculate your lean body mass (fat-free mass) using the Boer, James, and Hume equations. See your body composition breakdown with estimated body fat percentage, compare results across formulas, and get personalized fitness insights.
Waist to Hip Ratio Calculator - Calculate your waist-to-hip ratio (WHR) to assess body fat distribution, health risks, and body shape type. Get personalized health insights with visual body shape analysis.
What Should I Weigh? - Find out what you should weigh based on your height using BMI guidelines. See your healthy weight range with a visual BMI spectrum, weight zone breakdown, and personalized health insights for adults.
WHtR Calculator - Calculate your waist-to-height ratio (WHtR) to assess body fat distribution and health risks. Includes visual gauge, health zone charts, and body shape indicators.
Medical Calculators
ANC Calculator - Calculate the Absolute Neutrophil Count (ANC) from CBC lab values with visual gauge, NCI toxicity grading, step-by-step calculation breakdown, and clinical interpretation for neutropenia assessment.
APGAR Score Calculator - Calculate a newborn baby's APGAR score from the five clinical signs — Appearance, Pulse, Grimace, Activity and Respiration. Pick a plain-language option for each criterion and instantly see the total score out of 10 on an animated ring, the interpretation band (reassuring, moderately abnormal, or critically low), a per-sign breakdown, and guidance for the 1, 5 and 10 minute assessments. Mobile friendly with a live running total. New
Blood Type Calculator - Predict possible blood types of offspring based on the blood types of both parents using ABO and Rh factor genetics. See Punnett square analysis and probability breakdown.
BSA Calculator - Calculate body surface area (BSA) using 5 medical formulas including Du Bois, Mosteller, Haycock, Gehan-George, and Boyd. Features step-by-step calculations, formula comparison, and drug dosing applications.
BUN to Creatinine Ratio Calculator - Calculate your BUN to creatinine ratio with instant clinical interpretation, visual kidney health indicators, and comprehensive analysis of what your results mean for kidney function.
Creatinine Clearance Calculator - Calculate creatinine clearance (CrCl) using the Cockcroft-Gault equation. Supports actual, ideal, and adjusted body weight calculations for accurate drug dosing guidance. Includes CKD stage classification and step-by-step formula breakdown.
FENa Calculator - Calculate the Fractional Excretion of Sodium (FENa) with step-by-step formula breakdown, clinical interpretation, and visual diagnosis guide for acute kidney injury assessment.
GFR Calculator - Calculate your estimated Glomerular Filtration Rate (eGFR) using the CKD-EPI 2021, CKD-EPI 2009, MDRD, and Cockcroft-Gault equations. Determine your CKD stage, view results across multiple formulas, and get personalized kidney health insights.
Glasgow Coma Scale Calculator - Calculate the Glasgow Coma Scale (GCS) score by combining eye-opening, verbal, and motor response ratings to assess a patient's level of consciousness. Get the total score (3-15), the standard E-V-M notation, a color-coded severity gauge (mild, moderate, severe), and a clear clinical interpretation. Supports both the adult and pediatric GCS scales and the "Not Testable" (NT) modifier for intubated or sedated patients. New
HbA1c Calculator - Calculate and convert between HbA1c percentage and average blood glucose levels in mg/dL or mmol/L. Essential tool for diabetes management and monitoring.
Heart Disease Risk Calculator - Estimate your 10-year risk of atherosclerotic cardiovascular disease (ASCVD) using the ACC/AHA Pooled Cohort Equations. Calculate heart age, see risk factor contributions, and get personalized recommendations to lower your cardiovascular risk.
Relative Risk Calculator - Calculate relative risk (RR) from a 2×2 contingency table. Get confidence intervals, absolute risk reduction (ARR), number needed to treat (NNT), attributable risk, and step-by-step solutions with interactive visualizations for clinical and epidemiological studies. New
Wells Score Calculator (DVT/PE) - Calculate the Wells score to estimate the clinical pretest probability of deep vein thrombosis (DVT) and pulmonary embolism (PE). Switch between the DVT and PE criteria, tick the risk factors and symptoms that apply, and instantly see a running score, a color-coded probability gauge, the three-tier (low / moderate / high) and two-tier (likely / unlikely) interpretation, and the recommended next step such as a D-dimer test or imaging. New
Pregnancy Calculators
Breastfeeding Calorie Calculator - Calculate your increased daily caloric needs while breastfeeding. Get personalized recommendations based on your lactation phase, activity level, and body metrics.
Dog Pregnancy Calculator - Estimate a pregnant dog's due date from a breeding date, ovulation date, LH surge, or the first day of diestrus. Review the expected whelping window, current gestation day, week-by-week progress, key veterinary timing points such as ultrasound and X-ray windows, and practical reminders for preparing a safe whelping setup, staffing the final week, planning transport limits, and avoiding overconfidence in a single due date when the breeding record is less precise. New
Due Date Calculator - Calculate your pregnancy due date based on last menstrual period or conception date. Get a complete pregnancy timeline with trimester milestones, week-by-week development, and important dates.
Gestational Age Calculator - Calculate gestational age in weeks and days from your last menstrual period (LMP) date or ultrasound measurements (CRL, BPD, FL, HC). Get your estimated due date, trimester stage, baby size comparison, and week-by-week development milestones.
hCG Doubling Time Calculator - Calculate the doubling time between two beta hCG (human chorionic gonadotropin) blood test results. Enter your two hCG values and the time between the draws to see your doubling time in hours, your 48-hour rise percentage, and your daily growth rate. A visual growth curve plots your result against the normal 48-72 hour doubling band, with level-aware reference ranges and a clear, color-coded interpretation of whether your hCG is rising as expected in early pregnancy.
How Many Weeks Pregnant Am I? - Calculate how many weeks pregnant you are based on your due date, last menstrual period (LMP), or conception date. Includes trimester progress, baby size comparison, and weekly milestones.
Implantation Calculator - Estimate your implantation window from your ovulation date or last menstrual period (LMP). See a day-by-day implantation probability curve, the most likely implantation date, the earliest reliable pregnancy test dates, your expected period, and your estimated due date — all on a clear, animated timeline based on published implantation-timing research.
IVF Due Date Calculator - Calculate your pregnancy due date from your IVF embryo transfer date. Works for a Day-3 (cleavage) or Day-5/Day-6 (blastocyst) transfer, fresh or frozen (FET). See your estimated due date, egg-retrieval and equivalent LMP dates, how many weeks pregnant you are today, and a full pregnancy milestone timeline on an animated 40-week trimester chart.
Pregnancy Calendar - Create your personalized pregnancy calendar with week-by-week development milestones, trimester breakdown, baby size comparisons, key appointment reminders, and due date countdown.
Pregnancy Calorie Calculator - Calculate your daily calorie needs during pregnancy based on pre-pregnancy weight, height, age, activity level, and gestational week. Uses IOM guidelines and Mifflin-St Jeor equation for accurate trimester-specific recommendations.
Pregnancy Weight Gain Calculator - Calculate your recommended pregnancy weight gain based on IOM 2009 guidelines. Track week-by-week progress, see your trimester breakdown, and get personalized recommendations for singleton or twin pregnancies.
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