1. What is a Car Ramp Slope Calculator?

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

Purpose: It helps mechanics, engineers, and DIYers design safe and functional car ramps with appropriate incline angles.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( S \) — Slope percentage (%)
• \( H \) — Ramp height (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 vehicle safety, prevents scraping, and maintains ADA compliance when applicable.

4. Using the Calculator

Tips: Enter the ramp height and length in feet. Both values must be > 0. Typical maximum slope for car ramps is 15%.

5. Frequently Asked Questions (FAQ)

Q1: What's the maximum recommended slope for car ramps?
A: Generally 10-15% maximum, with 12.5% being a common standard for vehicle ramps.

Q2: How does slope percentage relate to degrees?
A: Slope percentage = tan(angle) × 100. A 15% slope equals about 8.5 degrees.

Q3: What if my calculated slope exceeds 15%?
A: Consider increasing ramp length or decreasing height to achieve a safer slope.

Q4: Does this work for wheelchair ramps too?
A: Yes, but ADA requires wheelchair ramps to have ≤ 8.33% slope (1:12 ratio).

Q5: How do I measure ramp height and length?
A: Height is vertical rise, length is horizontal run (not the diagonal ramp surface).