How to calculate the side of cube when you're given the volume?

The volume ($V$) of a cube with side length ($s$) is given by:

$$V = s^3$$

To find $s$, take the cube root of the volume:

$$s = \sqrt[3]{V}$$

For instance, if the volume of a cube is $27\text{ cm}^3$:

$$s = \sqrt[3]{27\text{ cm}^3}$$ $$s = 3\text{ cm}$$

The side length of the cube is $\boxed{\text{the cube root of its volume}}$.