Geometry Calculators

Area, volume, perimeter, circles, triangles, and shapes.

Circle Calculator — Area, Circumference & Diameter
Enter radius, diameter, area, or circumference to find all other circle measurements.
Triangle Calculator — Area, Perimeter & Angles (SSS)
Enter three side lengths to find area, perimeter, angles, and whether the triangle is equilateral, isosceles, or scalene.
Volume Calculator — Sphere, Cylinder, Cone, Cube & More
Select a 3D shape and enter dimensions to calculate volume and surface area.
Perimeter Calculator — Rectangle, Triangle, Circle & More
Select a shape and enter dimensions to find perimeter and area.