Elevation Percentage Formula:
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Elevation percentage, also known as grade or gradient, is a measure of the steepness of a slope. It represents the ratio of vertical elevation change to horizontal distance, expressed as a percentage. This calculation is essential in various fields including civil engineering, construction, and outdoor activities.
The calculator uses the elevation percentage formula:
Where:
Explanation: The formula calculates the ratio of vertical change to horizontal distance and converts it to a percentage by multiplying by 100.
Details: Accurate elevation percentage calculation is crucial for road construction, trail design, drainage planning, wheelchair accessibility compliance, and determining suitable slopes for various applications.
Tips: Enter elevation change and distance in feet. Both values must be positive numbers. The calculator will compute the elevation percentage and display the result.
Q1: What is considered a steep slope?
A: Generally, slopes above 15% are considered steep. For reference, a 100% grade equals a 45-degree angle.
Q2: How does elevation percentage relate to degrees?
A: To convert percentage to degrees: angle = arctan(percentage/100). For example, a 100% grade equals a 45-degree angle.
Q3: What is the maximum recommended slope for wheelchair access?
A: ADA guidelines recommend a maximum slope of 1:12 (8.33%) for wheelchair ramps.
Q4: Can I use different units of measurement?
A: The calculator uses feet, but the formula works with any consistent units (both elevation change and distance must be in the same units).
Q5: How accurate is this calculation for real-world applications?
A: The calculation provides a theoretical value. In practice, factors like terrain irregularities and measurement precision may affect actual results.