Parking Ratio Calculator

Enter the total amount of rentable square footage of a building and the total number of parking spots into the calculator to determine the parking ratio.

Parking Ratio Formula

The following formula is used to calculate a parking ratio.


  • Where PR is the parking ratio
  • RSQF is the rentable square footage of the building
  • #PS is the total number of parking spots

Parking Ratio Definition

What is a parking ratio? A parking ratio is defined as the total ratio of rentable square footage of a building to the total number of parking spots of that building. Typically this ratio is reduced to parking spots per 1,000 square feet. For example, a ratio of 10,000/1 would be reduced to a ratio of 10:1.

Example Problem

How to calculate a parking ratio?

  1. First, determine the total rentable square footage.

    For this example, our 10 story building has a total rentable square footage 20,000 square feet.

  2. Next, determine the number of parking spots.

    In this same building, there are 10 parking spots.

  3. Finally, calculate the park ratio.

    Using the formula above, the parking ratio is found to be 200:1.

About Parking Ratio

How to determine the parking ratio? Determining a parking ratio is as simple as using the formula PR = RSQF / #PS. To reduce this further some people like to express the ratio as per 200 or 1000 square feed.

parking ratio calculator
parking ratio formula