Surface Area of a Sphere

This calculator will calculate the surface area of a sphere, given the radius. However, it can also calculate the radius, given the surface area. This simple article might be useful for GCSE students.

Formula

S = 4 π r²

This formula provides the surface area, given the radius.

Calculator

This calculator will calculate the surface area, and the radius. As you can see, it is very simple to use and you press the relevant button.

Find Radius

Transposing the standard formula gives the formula for the surface area.

Radius One Unit

For a radius of one unit, the formula simplifies to 4 π.