Surface area calculator
Pick a solid and enter its measurements. Useful for paint, wrapping, insulation and material estimates.
Surface area: 345.5752 sq in
Your answer
Surface area345.5752 sq in
Worked out in your browser. Nothing you type is sent to a server.
How we worked it out
Updated as you change the numbers.
- A = 2πr(r + h).
Method and assumptions
Surface area includes every face, including bases. The slant height of a cone is √(r² + h²); for a square pyramid it is √((s/2)² + h²).
Questions
What is the surface area of a sphere with a 5 in radius?
314.16 square inches.
Sources
Method and figures checked on . Every worked answer on this page is covered by an automated test. Found a mistake? Tell us.
Embed this calculator on your site
Free to use. Paste this where you want the calculator; it runs in your visitors’ browsers, sets no cookies and sends nothing to us.