Enter the rise and run of your driveway into the calculator to determine the slope percentage. This calculator helps in assessing the steepness of a driveway, which is important for safety and construction standards.

Driveway Slope Formula

The following formula is used to calculate the slope of a driveway:

Slope () = (Rise / Run) * 100


  • Rise is the vertical change in height (inches)
  • Run is the horizontal distance over which the rise occurs (feet)
  • Slope is the steepness or incline of the driveway expressed as a percentage

To calculate the driveway slope, divide the rise by the run and then multiply by 100 to get the percentage.

What is a Driveway Slope?

A driveway slope is the measure of how steep a driveway is. It is calculated as the ratio of the vertical rise to the horizontal run, expressed as a percentage. The slope is an important consideration in driveway design, affecting the ease of access, drainage, and safety. Driveways with too steep a slope can be difficult to navigate, especially in adverse weather conditions, while those with too gentle a slope may have issues with water pooling.

How to Calculate Driveway Slope?

The following steps outline how to calculate the Driveway Slope:

  1. First, measure the rise (the vertical height) of the driveway in inches.
  2. Next, measure the run (the horizontal distance) of the driveway in feet.
  3. Convert the run from feet to inches to match the units of the rise.
  4. Use the formula: Slope (%) = (Rise / Run) * 100 to calculate the slope.
  5. Enter the rise and run into the calculator to get the slope percentage.

Example Problem:

Use the following variables as an example problem to test your knowledge.

Rise of the driveway = 15 inches

Run of the driveway = 20 feet