# How to calculate surface area?

You need to find out how many sq M of paving needs to be coated, including any edges. For around the pool determine the pool length and width first in metres (one large step is a metre).

So **(Length + Width) x 2 = perimeter**, “**A**” in the formula below.

Now how wide is the pavement – path, which is “**B**” in formula below?

(Add any edges, like coping tiles if you want to coat these too for “**B**“). So Sq M to coat is: perimeter (**A**) and width of pavement (**B**) of your swimming pool.

Use following formula:

**A x B x 1.1**

*Example:*

*Your pool is 9m long and 4.5m wide that gives 27m perimeter.*

*Pavement width 1.2 m (inc coping)
*

*27 x 1.2 x 1.1=35.7 sq.m (say 36 sq M)
*

In more complicated cases, (such as a free shape pavement), if you need help in measuring the surface area please send us the plan if available.