1. What is a Ramp Angle Calculator?

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

Purpose: It helps architects, builders, and DIY enthusiasts design ramps with proper inclines for accessibility and safety.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \theta \) — Angle of the ramp (degrees)
• \( H \) — Vertical height of the ramp (feet)
• \( L \) — Horizontal length of the ramp (feet)

Explanation: The arctangent function calculates the angle whose tangent is the ratio of height to length.

3. Importance of Ramp Angle Calculation

Details: Proper ramp angles are crucial for accessibility (ADA recommends ≤ 4.8°), safety, and functionality of the ramp.

4. Using the Calculator

Tips: Enter the vertical height (rise) and horizontal length (run) in feet. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What's the maximum recommended ramp angle?
A: ADA recommends 1:12 slope (4.8°). Steeper ramps may require handrails and are less accessible.

Q2: How do I measure height and length?
A: Height is vertical rise, length is horizontal run (not the diagonal ramp surface length).

Q3: Can I use different units?
A: Yes, as long as both measurements use the same units (both in feet, both in meters, etc.).

Q4: What if my ramp has multiple sections?
A: Calculate each section separately or use total height and total horizontal length.

Q5: How does this relate to slope percentage?
A: Slope percentage = (H/L) × 100. A 4.8° angle equals about 8.3% slope.