Perimeter of a rhombus
Definition: The total distance around the outside of a rhombus
Try this Drag any orange dot to resize the rhombus. The perimeter is calculated as you drag.

How to find the perimeter of a rhombus

Like any polygon, the perimeter is the total distance around the outside, which can be found by adding together the length of each side. In the case of a rhombus, all four sides are the same length by definition, so the perimeter is four times the length of a side. Or as a formula:

perimeter = 4S where:
S is the length of any one side

In the figure above, drag any orange dot to resize the rhombus. From the side length shown, calculate the perimeter and verify your result matches the formula at the top of the diagram.

Related polygon topics

General

Types of polygon

Area of various polygon types

Perimeter of various polygon types

Angles associated with polygons

Named polygons

COMMON CORE

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