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 ratio of vertical rise to horizontal run multiplied by 100, making it easier to understand and compare slopes.

2. How Does the Calculator Work?

The calculator uses the slope percentage formula:

Where:

• \( \text{rise} \) — Vertical change (in units like meters or feet)
• \( \text{run} \) — Horizontal change (in units like meters or feet)
• \( 100 \) — Percentage conversion factor (unitless)

Explanation: This formula calculates how much vertical elevation change occurs per unit of horizontal distance, expressed as a percentage.

3. Importance of Slope Calculation

Details: Calculating slope percentage is crucial for designing accessible ramps, determining vehicle ramp suitability, construction projects, and ensuring compliance with building codes and safety standards.

4. Using the Calculator

Tips: Enter both rise and run values in the same units (meters, feet, etc.). Ensure run is greater than zero. The calculator will output the slope percentage.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical slope percentage for car ramps?
A: Most vehicle ramps have a slope between 10-20%, though specific requirements vary by vehicle type and local regulations.

Q2: How does slope percentage relate to degrees?
A: Slope percentage = tan(angle) × 100. For example, a 45° angle equals a 100% slope.

Q3: What's the maximum recommended slope for accessibility ramps?
A: ADA guidelines recommend a maximum slope of 8.33% (1:12 ratio) for wheelchair accessibility.

Q4: Can I use different units for rise and run?
A: No, both measurements must be in the same units for accurate percentage calculation.

Q5: What does a negative slope percentage indicate?
A: A negative percentage would indicate a downward slope, but this calculator only handles positive values for ramp calculations.