# Square Calculator

Calculation of the values of a square (a regular quadrilateral). A square is a quadrilateral with four right angles and four sides of equal length. Enter one of the known values . Then click “Calculate”.

**Square Calculator**

**Side length (a)**

**Diagonal (D)**

**Perimeter (p)**

**Square (S)**

**The radius of the circumscribed circle (R)**

**Radius of the inscribed circle (r)**

## Formulas

d = √2 * a

p = 4 * a

S= a²

R = a / √2

r = a / 2

All angles are 90°, 2 diagonals.