Ramp Slope Formula:
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Definition: This calculator computes the slope percentage of a ramp based on its vertical height and horizontal length.
Purpose: It helps architects, builders, and accessibility planners ensure ramps meet required slope standards.
The calculator uses the formula:
Where:
Explanation: The height is divided by the length to get the slope ratio, then multiplied by 100 to convert to percentage.
Details: Proper slope calculation ensures ADA compliance (maximum 8.33% slope), safety, and usability for all individuals.
Tips: Enter the vertical height and horizontal length in feet. Both values must be > 0. The result shows the slope percentage.
Q1: What's the maximum ADA-compliant slope?
A: The ADA recommends a maximum slope of 1:12 (8.33%) for wheelchair ramps.
Q2: How do I measure height and length?
A: Height is vertical rise, length is horizontal run (not the ramp surface length).
Q3: What if my slope exceeds ADA standards?
A: You'll need to increase the ramp length or add resting platforms.
Q4: Does this work for other slopes (driveways, etc.)?
A: Yes, the same calculation applies to any slope measurement.
Q5: How precise should my measurements be?
A: Measure to within 1/4 inch for critical accessibility applications.