Arc Length Calculator - Calculate arc length, radius, or central angle of a circle sector with interactive diagram, step-by-step solution, and support for degrees and radians.

Cartesian to Polar Coordinates Converter - Convert Cartesian coordinates (x, y) to polar coordinates (r, θ) with adjustable precision from 1 to 1000 decimal places. Features step-by-step solutions, interactive coordinate plane visualization, quadrant analysis, and verification.

Circle Calculator - Calculate radius, diameter, circumference, and area of a circle from any single value. Includes arc length, sector area, chord length, and segment area calculations with step-by-step solutions and interactive diagram.

Cone Flat Pattern (Template) Generator - Generate the 2D flat pattern (developed surface) of a cone or truncated cone (frustum). Calculate the outer radius, inner radius, and sweep angle needed to cut the unrolled template from sheet metal, cardboard, or paper. Essential for DIY, manufacturing, HVAC ductwork, and paper crafting. New

Distance Between Two Points Calculator - Calculate the Euclidean distance between two points in a 2D coordinate plane with step-by-step formulas, interactive visualization, midpoint, slope, and line equation calculations.

Ellipse Circumference Calculator - Calculate the circumference (perimeter) of an ellipse using multiple approximation formulas including Ramanujan, exact series, and visualize results with an interactive SVG diagram.

Euler Characteristic Calculator - Calculate the Euler characteristic (χ = V − E + F) from vertices, edges, and faces. Identify topological structure, genus, and surface type with step-by-step solutions, interactive 3D visualization, and Platonic solid comparisons. New

General Triangle Solver - The ultimate tool to solve any triangle. Input three known values (e.g., SSS, SAS, ASA, AAS) and automatically calculate all missing sides, angles, area, and perimeter using the law of sines, law of cosines, and Heron's formula.

Golden Rectangle Calculator - Calculate golden rectangle dimensions from any side length. Visualize the golden ratio (φ ≈ 1.618) with interactive diagrams showing interior and outer rectangles, plus step-by-step formulas.

Golden Section Calculator - Calculate the missing values to complete the golden section. Enter any value (a+b, a, or b) to find the golden ratio proportions with step-by-step explanation and visual diagram.

Hypotenuse Calculator - Calculate the hypotenuse of a right triangle using the Pythagorean theorem. Get instant results with visual diagrams, step-by-step solutions, angles, area, and perimeter. Featured

Midpoint Calculator - Calculate the midpoint between two points instantly with interactive visualization, step-by-step solution, distance calculation, and comprehensive geometry analysis.

Point to Plane Distance Calculator - Calculate the shortest perpendicular distance from a point (x₀, y₀, z₀) to a plane Ax + By + Cz + D = 0. Get step-by-step solution, foot of perpendicular, interactive 3D visualization, and geometric analysis. New

Polar to Cartesian Converter - Convert polar coordinates (r, θ) to Cartesian coordinates (x, y) with up to 1000 decimal places precision. Features interactive visualization, step-by-step solutions, quadrant detection, and verification.

Polygon Diagonals Calculator - Calculate the number of diagonals in an n-sided polygon, find the sum of interior angles, each interior angle of a regular polygon, and visualize the polygon with all its diagonals drawn. New

Pythagorean Theorem Calculator - Calculate the missing side of any right triangle using a² + b² = c². Get step-by-step solutions, interactive triangle visualization, area, perimeter, and angle calculations.

Rectangle Calculator - Calculate rectangle area, perimeter, diagonal, inscribed circle, circumscribed circle, and aspect ratio from any two known values. Includes interactive SVG diagram and step-by-step solutions.

Shoelace Formula Calculator - Calculate the area of any polygon from its (x, y) vertex coordinates using the Shoelace (Gauss) algorithm. Supports triangles, quadrilaterals, and complex polygons. Ideal for surveying, GIS, land measurement, and geometry problems. New

Slope Calculator - Calculate slope, gradient, angle, and line equation from two coordinate points. Features interactive graph visualization, step-by-step solutions, and multiple output formats.

Slope Intercept Form Calculator - Calculate slope intercept form (y=mx+b) from two points, point and slope, or standard form. Get step-by-step solution with interactive graph visualization.

Sphere Equation Calculator - Find the standard and general equation of a sphere given center coordinates and radius, or two endpoints of a diameter. Includes step-by-step derivation, 3D visualization, and geometric properties. New

Square Calculator - Calculate all properties of a square instantly. Enter side length, area, perimeter, or diagonal to find all other measurements with step-by-step formulas and interactive visualization.

Triangle Centroid Calculator - Calculate the centroid (center of mass) of any triangle given its three vertex coordinates. Get step-by-step solution, triangle properties, and an interactive visual diagram with medians. New

Triangle Orthocenter Calculator - Calculate the orthocenter (intersection of the three altitudes) of any triangle given its three vertex coordinates. Get step-by-step solution, altitude equations, triangle classification, and an interactive visual diagram. New