Calculate slope distance, rise, run, grade, and angle from any two known values, with unit conversions for surveys and ADA ramps.

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Slope Distance Formula

The following formula is used to calculate the Slope Distance. 

SD = SQRT (Ri^2+Ru^2)
  • Where SD is the Slope Distance (in)
  • Ri is the rise of the slope (in) 
  • Ru is the run of the slope (in) 

How to Calculate Slope Distance?

The following example problems outline how to calculate Slope Distance.

Example Problem #1:

  1. First, determine the rise of the slope (in).
    • The rise of the slope (in) is given as:  5.
  2. Next, determine the run of the slope (in).
    • The run of the slope (in) is provided as: 7.
  3. Finally, calculate the Slope Distance using the equation above: 

SD = SQRT (Ri^2+Ru^2)

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

SD = SQRT (5^2+7^2) = 8.6023 (in)


FAQ

What is the importance of calculating slope distance?
Calculating slope distance is crucial for various engineering and construction projects, as it helps in designing roads, railways, and determining the steepness of a terrain. It ensures that structures are built safely and efficiently by accurately measuring the incline between two points.

Can the slope distance formula be used for any type of slope?
Yes, the slope distance formula can be applied to any type of slope, whether it is gentle or steep. It is a versatile calculation that only requires the rise and run measurements to determine the distance of the slope accurately.

How does the slope distance differ from horizontal or vertical distance?
Slope distance is the direct diagonal distance between two points on a slope, taking into account both the vertical (rise) and horizontal (run) components. In contrast, horizontal distance measures the straight-line distance between two points ignoring any elevation change, while vertical distance measures the elevation difference disregarding horizontal separation. The slope distance provides a more comprehensive understanding of the actual distance traveled over a slope.