Geometry Calculators — Mathematics

Solve a 30-60-90 triangle from any one side. Get the short leg, long leg, hypotenuse, area, and perimeter instantly.

Solve a 45-45-90 triangle from a leg or the hypotenuse. Get both equal legs, the hypotenuse, area, and perimeter with instant results.

Calculate angle bisector length with inputs, formulas, and instant results.

Calculate area of an annulus (ring) from inner and outer radii.

Calculate the area, perimeter, and diagonal of a rectangle. Find missing sides from known area. Convert between metric and imperial area units.

Calculate circle segment area with inputs, formulas, and instant results.

Calculate volume, surface area, and slant height of a cone.

Calculate distance between two points using the distance formula with step-by-step work.

Calculate volume, surface area, and lateral area of a cylinder.

Calculate the diagonal of a rectangle, square, or cube from side lengths.

Calculate the distance between two points in 2D, 3D, or N-dimensional space.

Calculate ellipse circumference with inputs, formulas, and instant results.

Calculate volume and surface area of a frustum (truncated cone or pyramid).

Calculate inscribed angles and intercepted arcs in a circle with step-by-step work.

Calculate area, perimeter, height, and diagonals of a parallelogram.

Calculate area, perimeter, interior angles, and apothem of any regular polygon.

Calculate area, perimeter, and diagonals of a rhombus from side and angle.

Calculate area, perimeter, and diameter of a semicircle from radius.

Calculate volume, surface area, and diameter of a sphere from radius.

Calculate star shape with inputs, formulas, and instant results.

Calculate the area, perimeter, and height of a trapezoid from base and side lengths.