Geometry & Trigonometry
Basic

Surface Area of a Cylinder

Total surface area of a closed cylinder.

Formula

A=2πr(r+h)A = 2\pi r(r + h)

Variables

rRadius
hHeight

Example

Radius 2, height 5: A = 2π·2·(2+5) ≈ 87.9 square units.

Did You Know?

Unroll a cylinder's side and it becomes a rectangle — that's where the 2πrh term comes from.

cylindersurface area