Geometry calculators

Area, perimeter, volume and surface area for rectangles, triangles, circles, spheres and cylinders, each with a labelled diagram.

Circle calculator

Area, circumference or diameter of a circle from its radius.

Volume, total surface or curved surface of a cylinder.

Area, perimeter or diagonal of a rectangle from its width and height.

Volume, surface area or diameter of a sphere from its radius.

Area, perimeter or height of any triangle.