1. What is a Handicap Ramp Slope Calculator?

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

Purpose: It helps ensure wheelchair ramps meet ADA compliance standards for safe accessibility.

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 percentage.

3. Importance of Ramp Slope Calculation

Details: ADA guidelines recommend a maximum 8.33% slope (1:12 ratio) for wheelchair ramps. Proper slope ensures accessibility and safety.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What's the maximum ADA-compliant ramp slope?
A: 8.33% slope (1:12 ratio) is the maximum for commercial ramps. Residential ramps may go up to 10% (1:10 ratio).

Q2: How do I measure ramp length correctly?
A: Measure the horizontal run (not the diagonal length) of the ramp for accurate slope calculation.

Q3: What if my slope exceeds ADA recommendations?
A: Consider extending the ramp length or adding switchbacks to reduce the slope percentage.

Q4: Does this include landing requirements?
A: No, ADA requires level landings at top, bottom, and every 30 feet of ramp length - not included in this calculation.

Q5: How does slope affect wheelchair use?
A: Steeper slopes require more effort to ascend and can be dangerous to descend. Below 5% is ideal for independent use.