Square Calculator
Enter a side length below to instantly get area, perimeter, and diagonal.
Area
36
Perimeter
24
Diagonal
8.4853
Square Formulas
Area = side². Perimeter = 4 × side. Diagonal = side × √2.
Worked example
A square with side 6.
Area: 6² = 36. Perimeter: 4 × 6 = 24.
Diagonal: 6 × √2 ≈ 8.49
Frequently Asked Questions
How do you find the area of a square?
Area = side × side (side²). A square with side 6 has an area of 36.
How do you find the perimeter of a square?
Perimeter = 4 × side, since all four sides are equal.
How do you find the diagonal of a square?
Diagonal = side × √2, from the Pythagorean theorem applied to the two equal sides.
Related Calculators
- Sphere Calculator — Geometry & Trigonometry
- Cylinder Calculator — Geometry & Trigonometry
- Cone Calculator — Geometry & Trigonometry
- Triangle Area Calculator — Geometry & Trigonometry