Sphere Surface Area Calculator

How the calculation works

Surface area = 4 × π × radius², with π = 3.141592653589793.

Worked example

With radius 2 m, surface area is 50.26548246 m².

Assumptions and limits

A complete smooth sphere. Enter its radius, not diameter, in meters from 0.001 to 1,000,000. This is the outer surface area only. Hemispheres, inner surfaces, seams, coating thickness and material waste are excluded.