1. What is a Ramp Slope Calculator?

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

Purpose: It helps architects, builders, and accessibility planners ensure ramps meet safety standards and accessibility requirements.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

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 accessibility compliance (ADA recommends ≤ 8.33%), safety, and usability for wheelchair users and others.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What's the maximum allowable slope for ADA compliance?
A: The ADA requires a maximum slope of 1:12 (8.33%) for wheelchair ramps.

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

Q3: What slope is too steep for a wheelchair ramp?
A: Anything steeper than 10% is generally considered too steep for safe wheelchair use.

Q4: How does slope percentage relate to degrees?
A: Slope percentage = tan(θ) × 100, where θ is the angle in degrees.

Q5: What if my slope exceeds ADA recommendations?
A: Consider lengthening the ramp or adding intermediate landings to reduce the effective slope.