Rhombus Perimeter

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Rhombus Perimeter Calculation:

  •  a =
    Side Length

    Length of one side of the rhombus.

  •  u =
    Units

    Optional unit label to append to the perimeter.

  •  P =
    Perimeter

    Total distance around the rhombus.

  • Decimals

    Choose the number of decimals to show in your answer. This is also known as significant figures. Select an appropriate amount of significant figures based on the precision of the input numbers.

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Rhombus Perimeter Formula

All four sides of a rhombus are equal, so the perimeter is four times one side length.

P = 4a

Live Diagram

The outline shows the four equal sides counted by the perimeter.

Rhombus Perimeter Variables

Side Length
The length of one side of the rhombus.
Perimeter
The full distance around the outside of the rhombus.

How the Calculation Works

  1. Measure one side.
  2. Multiply by 4 because a rhombus has four equal sides.

Rhombus Perimeter Example

What is the perimeter of a rhombus with side length 6?

  • P = 4 x 6
  • P = 24 units

A rhombus with side length 6 has a perimeter of 24 units.