Cylinder Calculator

Work out the volume, surface area and dimensions of a cylinder from its radius and height.

Cylinder calculator

Radius r

Height h

Volume: —

Total surface area: —

Lateral area: —

Base area: —

Space diagonal: —

Use one unit for the radius and height to get results in square and cubic units.

Common questions about the free online cylinder calculator.

Enter the radius and the height. The tool uses pi times the radius squared times the height and shows the answer at once.

Volume equals pi multiplied by the radius squared and then by the height, written as V = pi r squared h.

Surface area is the two circular ends plus the curved side, so 2 pi r squared plus 2 pi r h, and the tool adds them up.

Lateral area covers only the curved side of the cylinder, while total surface area also includes the top and bottom circles.

It is the longest straight line inside the cylinder, from one rim to the opposite rim, equal to the root of 4r squared plus h squared.

No. Everything is calculated locally in your browser, so the numbers you type are never transmitted or stored.

Yes. The calculator is fully responsive and works on desktop, tablet and phone screens of any size.

Yes. The cylinder calculator is completely free, unlimited and needs no account, sign-up or installation.

Last updated: October 10, 2026