Circle Calculator

Calculate area, circumference from radius or diameter.

Input Type

Enter Radius

All Geometry Calculators

Circle Calculator

Area, circumference

Triangle Calculator

Area, angles, sides

Rectangle Calculator

Area, perimeter

Square Calculator

Area, perimeter

Sphere Calculator

Volume, surface area

Cylinder Calculator

Volume, surface area

Cone Calculator

Volume, surface area

Cube Calculator

Volume, surface area

Ellipse Calculator

Area, circumference

Trapezoid Calculator

Area, perimeter

Parallelogram Calculator

Area, perimeter

Polygon Calculator

Regular polygons

Hexagon Calculator

Area, perimeter

Distance Calculator

Between two points