1. What is Wheelchair Ramp Slope Calculation?

Definition: This calculator determines the slope percentage of a wheelchair ramp based on its vertical rise and horizontal run.

Purpose: It helps ensure wheelchair ramps meet accessibility standards and are safe for users.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( S \) — Slope percentage (%)
• \( H \) — Vertical height (feet)
• \( L \) — Horizontal length (feet)

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

3. Importance of Ramp Slope Calculation

Details: Proper slope calculation ensures ADA compliance (maximum 8.33% for commercial ramps) and safe, accessible design.

4. Using the Calculator

Tips: Enter the vertical height and horizontal length in feet. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the maximum allowable slope for wheelchair ramps?
A: ADA requires 1:12 slope (8.33% max) for commercial ramps. Residential ramps may go up to 20% for short rises.

Q2: How does slope affect ramp usability?
A: Steeper slopes make pushing wheelchairs more difficult and can be dangerous if too steep.

Q3: What if my slope exceeds recommended maximums?
A: Increase ramp length or add intermediate landings to break up the slope.

Q4: Does this calculation account for ramp surface?
A: No, additional factors like surface texture may affect actual usability beyond just slope percentage.

Q5: How do I measure height and length accurately?
A: Height is vertical rise from ground to landing. Length is horizontal run (not the ramp surface length).