Square Calculator

Find a square's area, perimeter and diagonal.

Area 25

Perimeter 20

Diagonal 7.071

Formula: area = side² ; diagonal = side × √2

Step-by-step with your numbers:

1. Values used:

2. Side length = 5

4. Area = Side length squared = 5 x 5 = 25

5. Perimeter = 20

6. Diagonal = 7.071

Did we solve your problem today?

All square measurements from one side length.

The math behind it

Area = side². Perimeter = 4 × side. Diagonal = side × √2.

Side 5 → area 25, perimeter 20, diagonal 7.07.

Diagonal?

It's the hypotenuse of two equal sides, so side × √2.