About this tool
Pick a 3D shape, enter its dimensions, and see its volume and surface area at once. The dimension fields change to match the shape, and everything is computed live in your browser.
Frequently asked questions
What shapes are supported?
Cube, sphere, cylinder, cone and rectangular box. The relevant dimension inputs appear automatically when you switch shapes.
Does the cone surface area include the base?
Yes. It uses πr(r + l) where l is the slant height, so the result is the full surface area including the circular base.