# Area, Perimeter and Diagonal of a Rectangle - Calculator

An easy to use online calculator to calculate the area, perimeter and diagonal of a
rectangle given its dimensions (length and width) is presented.

The formulas for the perimeter P, area A and length D of the diagonal of a rectangle of length L and width W are given by:

*P = 2 L + 2 W*

*A = L W*

*D = √( L*

^{ 2}+ W^{ 2})

## How to Find the Perimeter and Area of a Rectangle Using the Calcualator?

Enter the length L and width W as positive real numbers and press "Calculate Perimeter and Area". The outputs are the area A, perimeter P and diagonal D of the rectangle.