1. What is Slope Percentage?

Slope percentage is a measure of the steepness of a ramp or incline, expressed as a percentage. It represents the vertical rise per 100 units of horizontal run and is crucial for accessibility compliance and construction standards.

2. How Does the Calculator Work?

The calculator uses the slope percentage formula:

Where:

• \( Rise \) — Vertical distance (inches or centimeters)
• \( Run \) — Horizontal distance (inches or centimeters)

Explanation: The formula calculates the ratio of vertical change to horizontal distance and converts it to a percentage by multiplying by 100.

3. Importance of Slope Calculation

Details: Proper slope calculation is essential for wheelchair accessibility, building code compliance, safety standards, and ensuring ramps are usable by people with mobility challenges.

4. Using the Calculator

Tips: Enter the vertical rise and horizontal run in the same units (inches or centimeters). Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is the maximum slope percentage for wheelchair ramps?
A: According to ADA standards, the maximum slope for wheelchair ramps is 8.33% (1:12 ratio) for commercial and public facilities.

Q2: How do I convert slope percentage to degrees?
A: Use the formula: degrees = arctan(slope percentage / 100). For example, a 10% slope equals approximately 5.71 degrees.

Q3: What's the difference between slope percentage and slope ratio?
A: Slope percentage is rise over run × 100, while slope ratio is expressed as rise:run (e.g., 1:12 means 1 unit rise per 12 units run).

Q4: Why is slope important for accessibility?
A: Proper slopes ensure that ramps are safe and usable for wheelchair users, people with walkers, and those with limited mobility.

Q5: Can this calculator be used for roof slopes?
A: Yes, the same formula applies to roof slopes, road grades, and any other incline calculations where you need to determine steepness.