# Length of a Rectangle Calculator

Rectangle is a four sided polygon where the opposite sides are parallel and equal in length. Length is the measurement of extension of an object. Here it refers to the longest side of the rectangle. Rectangle has two diagonal which are equal in length and intersecting at the middle. All interior angle in rectangle equals 90 degree. You can use this online length of a rectangular calculator to find the rectangle length by providing the width and perimeter as inputs.

## Find the Length of a Rectangle Given Perimeter

Rectangle is a four sided polygon where the opposite sides are parallel and equal in length. Length is the measurement of extension of an object. Here it refers to the longest side of the rectangle. Rectangle has two diagonal which are equal in length and intersecting at the middle. All interior angle in rectangle equals 90 degree. You can use this online length of a rectangular calculator to find the rectangle length by providing the width and perimeter as inputs.

Code to add this calci to your website

#### Formula:

L = (P/2) - w
**Where,**
L = Length of a Rectangle
P = Perimeter
w = Width

#### Example

**A rectangle has its perimeter as 20 m and width as 5 m. What is its length ?**

L = (20/2) - 5 = 10 - 5

L= 5m.