1. What is a Ramp Ratio Calculator?

Definition: This calculator determines the ratio between a ramp's length and height, which indicates its steepness.

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

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( R \) — Ramp ratio (unitless)
• \( L \) — Length of ramp (feet)
• \( H \) — Height of ramp (feet)

Explanation: The ratio represents how many feet of ramp length are needed for each foot of vertical rise.

3. Importance of Ramp Ratio

Details: Proper ramp ratios ensure accessibility, safety, and compliance with building codes (typically 1:12 for ADA compliance).

4. Using the Calculator

Tips: Enter the ramp length and height in feet. Both values must be > 0. The result shows the ratio (e.g., 12 means a 12:1 ratio).

5. Frequently Asked Questions (FAQ)

Q1: What is a good ramp ratio?
A: For ADA compliance, the ratio should be at least 12:1 (12 feet of length per 1 foot of rise).

Q2: Can the ratio be too small?
A: Yes, ratios smaller than 12:1 create steeper ramps that may be difficult or unsafe for wheelchair users.

Q3: How does this relate to slope percentage?
A: Slope percentage = (1/Ratio) × 100. A 12:1 ratio equals about 8.33% slope.

Q4: What if my ramp has multiple runs?
A: Calculate each section separately. The ratio applies to each individual ramp segment.

Q5: Does this account for landings?
A: No, landing requirements are separate from the ramp ratio calculation.