Calculate the area, perimeter, and diagonal of a square. Enter the side length.

Area: 25.0000
Perimeter: 20.0000
Diagonal: 7.0711
Side: 5.0000

Formulas: Area = a². Perimeter = 4a. Diagonal = a√2.

Square Area

The area of a square is the side length squared. All sides are equal and all angles are 90° .

How to Use This Calculator

1. Enter side length: The length of any side.
2. Calculate: Click “Calculate” or press Enter.