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Slope Percentage Formula:
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Slope percentage is a measure of the steepness or incline of a surface, expressed as a percentage. It represents the ratio of vertical change (rise) to horizontal change (run) multiplied by 100.
The calculator uses the slope percentage formula:
Where:
Explanation: The formula calculates the ratio of vertical to horizontal distance and converts it to a percentage value to represent the slope steepness.
Details: Slope percentage calculation is crucial in various fields including construction, civil engineering, landscaping, road design, and accessibility planning. It helps determine proper drainage, structural stability, and compliance with building codes.
Tips: Enter both rise and run values in the same units (meters, feet, etc.). Both values must be positive numbers greater than zero. The calculator will automatically compute the slope percentage.
Q1: What is considered a steep slope?
A: Generally, slopes above 15-20% are considered steep, while slopes above 30% are very steep and may require special construction considerations.
Q2: How does slope percentage relate to degrees?
A: Slope percentage = tan(angle) × 100. For example, a 45-degree angle equals 100% slope (tan(45°) = 1, so 1 × 100 = 100%).
Q3: What is the maximum slope for wheelchair accessibility?
A: ADA guidelines typically recommend slopes no greater than 8.33% (1:12 ratio) for wheelchair ramps.
Q4: Can slope percentage be negative?
A: While mathematically possible, slope percentage is typically expressed as a positive value representing the magnitude of incline or decline.
Q5: What units should I use for rise and run?
A: You can use any units (meters, feet, inches, etc.) as long as both rise and run are measured in the same units.