Volume & Surface Area Calculator

Compute the volume and surface area of common 3D shapes — cube, cuboid (box), sphere, cylinder, cone, square pyramid, and hemisphere — from their dimensions, with the formulas shown. Pick a shape, enter its dimensions, and the volume and total surface area are calculated live. Everything runs locally in your browser.

Enter the dimensions to compute.

All formulas use standard geometry. Surface area is the total surface area (e.g. a cylinder includes both circular ends, a cone includes its circular base, a hemisphere includes its flat circular face). Dimensions must be positive. Results are in cubic units (volume) and square units (surface area) of whatever you entered. Everything runs locally — nothing leaves your browser.