The total distance around the outside of a
Drag any orange dot to resize the rectangle. The perimeter is calculated as you drag.
How to find the perimeter of a rectangle
Like any polygon, the perimeter is the total distance around the outside,
which can be found by adding together the length of each side.
I the case of a rectangle, opposite sides are equal in length, so the
perimeter is twice its width plus twice its height. Or as a formula:
perimeter = 2(w+h)
w is the width of the rectangle
h is the height of the rectangle
In the figure above, drag any orange dot to resize the rectangle. From the width and height shown, calculate the perimeter
and verify your result matches the formula at the top of the diagram.
Use the calculator on the right to calculate the properties of a rectangle.
Enter the two side lengths and the rest will be calculated.
For example, enter the two side lengths. The area, perimeter and diagonal lengths will be found.
Related polygon topics
Types of polygon
Area of various polygon types
Perimeter of various polygon types
Angles associated with polygons
(C) 2009 Copyright Math Open Reference. All rights reserved
Math Open Reference now has a Common Core alignment.
See which resources are available on this site for each element of the Common Core standards.
Check it out