Volume of a sphere

The volume of a sphere is the amount of space the sphere takes up. Put simply, it is how many litres of water you can pour into the sphere. For a sphere with radius r, the volume, which we usually write as V (for “volume”), is

$$V=\frac{4}{3}\cdot \pi \cdot r^3$$

Imagine a sphere with radius r = 4. We would work out its volume like this:

$$V=\frac{4}{3}\cdot \pi \cdot 4^3=\frac{4}{3}\cdot \pi \cdot 64=\frac{256\cdot \pi }{3}$$

Calculator: work out the volume of a sphere