# Surface Area of Cuboid

To calculate the **surface area of a cuboid**, we need to know a length of all of its three edges. If we look at a formula of the **surface area of a cuboid**, we can see a calculation of the area of its each face sides in brackets. And because each of them is in a cuboid twice, the bracket is multiplied twice too. A knowledge of this formula is useful to calculate how much paint or material we need to paint or tile a room. The elementary unit of the surface area is one square metre, it means the second power of one metre (1 m^{2}).

## Surface Area of Cuboid - formula

**Surface Area of Cuboid**

=
2 × (side length l × side length w + side length l × side length h + side length w × side length h)

S = 2 × (l × w + l × h + w × h)