# Perimeter of Square

To calculate the **perimeter of a square** we need to know a side length. A square is a shape with four equal sides and four right angles. The perimeter is a sum of all its sides. It could be, for example, a length of a fence around a squared garden. The elementary unit is one metre (1 m).

## Perimeter of Square - formula

**Perimeter of Square** = 4 × side length

P = 4 × a

## Perimeter of Square - calculator

The calculation unit of **Perimeter of Square** depends on filled values.

When you fill in your values in metres, the result is in metres.

The result of the **Perimeter of Square** is shown to maximum accuracy of thousandths (to 3 d.p.).