Rectangle Calculation

A rectangle is a quadrilateral with four right angles. To calculate the rectangle, two parameters must be known. The result shows the properties that can be calculated from the specified parameters.

To perform the calculation, select the type of parameters and enter their values. Then click the 'Calculate' button.

Calculate rectangle online  Input Delete Entries Length a Width b Width b Diagonal d Area A Perimeter P Decimal places 0 1 2 3 4 6 8 10  Results Length a Width b Diagonal d Area A Perimeter P

Rectangle formulas

Length

\(\displaystyle a = \frac{A}{b}\)

Width

\(\displaystyle b = \frac{A}{a}\)

Area

\(A = a ·b\)

Perimeter

\(P = (2 · a) + (2 · b)\)

Diagonal

\(d = \sqrt{a^2 + b^2}\)