1. What is a Ramp Slope Percentage Calculator?

Definition: This calculator determines the slope percentage of a ramp based on its height and length measurements.

Purpose: It helps architects, builders, and accessibility planners ensure ramps meet required slope standards.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( S \) — Slope percentage (%)
• \( H \) — Height difference (feet)
• \( L \) — Ramp length (feet)

Explanation: The height is divided by the length to get the slope ratio, then multiplied by 100 to convert to percentage.

3. Importance of Ramp Slope Calculation

Details: Proper slope calculation ensures ADA compliance (maximum 8.33% for wheelchair ramps), safety, and functionality.

4. Using the Calculator

Tips: Measure the vertical height change (rise) and horizontal length (run) of your ramp in feet. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the maximum slope for an ADA compliant ramp?
A: The maximum slope is 1:12 ratio, which equals 8.33% slope (1 foot rise per 12 feet run).

Q2: How do I measure ramp height and length?
A: Height is the vertical change from start to finish. Length is the horizontal distance (not the sloped surface length).

Q3: What slope is too steep for a wheelchair ramp?
A: Anything steeper than 8.33% (1:12 ratio) is generally too steep for independent wheelchair use.

Q4: Can this calculator be used for other slopes?
A: Yes, it works for any slope calculation including driveways, wheelchair ramps, or landscape grading.

Q5: How does slope percentage relate to degrees?
A: Slope percentage is not the same as degrees. A 100% slope equals 45 degrees (1:1 ratio).