Surface Area Calculator

Surface area calculator

Calculate the outside area of a cube, rectangular prism, cylinder, sphere, cone or pyramid.

The formula depends on the solid: cube 6a², sphere 4πr² and cylinder 2πr(r+h), among others.

Select a solid and enter its dimensions. A pyramid uses base area, base perimeter and slant height.

The result is the area that would be painted, covered or coated.

Practical examples

• A sphere with radius 3 has surface area 36π, about 113.097.

Limitations and notes

• Cone and pyramid slant height must match the supplied dimensions.
• Use valid values and keep all units consistent.

How to use

1. 1Choose a solid.
2. 2Enter its dimensions.
3. 3Review the formula and total area.

Frequently asked questions