Surface Area Calculator

Name: Surface Area Calculator
Rating: 4.8 (987 reviews)

Calculate surface area of common 3D geometric shapes.

Calculator

Shape

Dimension 1 — radius or side a

Dimension 2 — height or side b

Dimension 3 — side c (cuboid only)

Result

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Sphere: SA=4πr². Cube: SA=6a². Cylinder: SA=2πr(r+h). Cone: SA=πr(r+l) where l=slant height. Cuboid: SA=2(lb+bh+lh). Surface area determines how much material is needed to cover a 3D object.