Enter the total perimeter length (in) and the total area (in^2) into the Perimeter Ratio Calculator. The calculator will evaluate and display the Perimeter Ratio. 

Perimeter Ratio Formula

The following formula is used to calculate the Perimeter Ratio. 

  • Where PRR is the Perimeter Ratio (1/in)
  • PL is the total perimeter length (in) 
  • TA is the total area (in^2) 

To calculate the perimeter ratio, divide the perimeter length by the total area.

How to Calculate Perimeter Ratio?

The following example problems outline how to calculate Perimeter Ratio.

Example Problem #1:

  1. First, determine the total perimeter length (in). 
    • The total perimeter length (in) is given as: 50.
  2. Next, determine the total area (in^2). 
    • The total area (in^2) is provided as: 600.
  3. Finally, calculate the Perimeter Ratio using the equation above: 


The values given above are inserted into the equation below and the solution is calculated:

PRR = 50 / 600 = .0833 (1/in)

Example Problem #2: 

For this problem, the variables required are provided below:

total perimeter length (in) = 70

total area (in^2) = 800

Test your knowledge using the equation and check your answer with the calculator above.

PRR = PL / TA = ?