Enter the height and distance into the calculator to determine the fall ratio. The fall ratio is a percentage that represents the steepness of a slope.

Fall Ratio Formula

The following formula is used to calculate the fall ratio:

FR = (H / D) * 100


  • FR is the fall ratio (%)
  • H is the height of the fall (feet)
  • D is the horizontal distance (feet)

To calculate the fall ratio, divide the height of the fall by the horizontal distance and then multiply by 100 to convert it to a percentage.

What is a Fall Ratio?

A fall ratio is a measure of the steepness or incline of a slope, typically used in engineering, construction, and landscaping. It is expressed as a percentage and is calculated by dividing the vertical height of the slope by the horizontal distance covered, then multiplying by 100. This ratio helps in designing slopes for roads, ramps, and other inclined surfaces to ensure safety and accessibility.

How to Calculate Fall Ratio?

The following steps outline how to calculate the Fall Ratio.

  1. First, measure the vertical height of the slope (H) in feet.
  2. Next, measure the horizontal distance covered by the slope (D) in feet.
  3. Use the formula FR = (H / D) * 100 to calculate the fall ratio.
  4. Finally, calculate the Fall Ratio (FR) as a percentage.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem:

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

Height of the slope (H) = 15 feet

Horizontal distance (D) = 100 feet