English | Español

Square Perimeter Formula

To find the perimeter of a square, you only need to know the length of one side. The perimeter is the total of all 4 equal sides added together.

Using the Side Length

The perimeter of a square equals 4 times the length of one side:

Square perimeter formula: P = 4l
Pperimeter of the square llength of one side

Square with Labeled Sides

The diagram shows a square with all four sides of equal length:

Square with labeled sides

Since all sides are equal, just measure one side and multiply it by 4.

More About the Square

Click on any element to learn more.

Explore More Shapes