Side length
Area
Perimeter
Diagonal
Enter any one value to calculate the others.
Note: All calculations are done in meters and converted to
selected units.
Free online square calculator – Calculate the area, perimeter, and diagonal of a square.
What is a square?
A square is a geometric shape that is a regular quadrilateral, meaning it has four equal sides and four equal angles. In a square:
- All four sides are of equal length.
- All four angles are right angles (90 degrees).
- The opposite sides are parallel.
Formula
- Area of square = (side)² = a²
- Diagonal of square = √2 x side = a√2
- Perimeter of square = 4 x side = 4a meter
Solved Example
Example.:-Square side length = 20 cm, find the area, perimeter and diagonal of the Square.
Area of square = (side)² = (20)² = 400 cm²
Diagonal of square = √2 x side = √2 x 20 = 28.284 cm
Perimeter of square = 4 x side = 4 x 20 = 80 cm