Geometry Calculators

Square Area Calculator

Calculate area, perimeter, and diagonal of a square from its side length.

Rectangle Area Calculator

Calculate area, perimeter, and diagonal of a rectangle.

Triangle Area Calculator

Calculate triangle area from base × height, or from three sides using Heron's formula.

Circle Area Calculator

Calculate area, circumference, diameter, and radius of a circle. Solve from any one value.

Parallelogram Area Calculator

Calculate area and perimeter of a parallelogram.

Trapezoid Area Calculator

Calculate area and perimeter of a trapezoid (trapezium).

Rhombus Area Calculator

Calculate area of a rhombus from its two diagonals, plus perimeter from the side length.

Ellipse Area Calculator

Calculate area and approximate circumference of an ellipse from its semi-major and semi-minor axes.

Regular Polygon Calculator

Calculate area, perimeter, and interior angle of a regular polygon.

Cube Volume Calculator

Calculate volume, surface area, and space diagonal of a cube.

Cuboid Volume Calculator

Calculate volume, surface area, and space diagonal of a cuboid (rectangular box).

Sphere Volume Calculator

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

Cylinder Volume Calculator

Calculate volume, total surface area, and lateral (curved) surface area of a cylinder.

Cone Volume Calculator

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

Square Pyramid Volume Calculator

Calculate volume, surface area, and slant height of a square-based pyramid.

Torus Volume Calculator

Calculate volume and surface area of a torus (doughnut shape).