1. What is a Slope Percentage Calculator?

Definition: This calculator determines the slope percentage of a ramp based on its rise and run measurements.

Purpose: It helps architects, builders, and landscapers ensure their ramps meet accessibility standards and functional requirements.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \% \) — Slope percentage
• rise — Vertical height change (units)
• run — Horizontal distance (units)

Explanation: The ratio of vertical rise to horizontal run is multiplied by 100 to convert it to a percentage.

3. Importance of Slope Percentage Calculation

Details: Proper slope calculation ensures ADA compliance (max 8.33% for ramps), proper drainage, and safe walking surfaces.

4. Using the Calculator

Tips: Enter the rise and run in the same units (inches, feet, meters, etc.). Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the maximum slope for an ADA compliant ramp?
A: The maximum slope is 1:12 ratio, which equals 8.33% slope.

Q2: How do I measure rise and run?
A: Rise is the vertical change in height. Run is the horizontal distance over which that change occurs.

Q3: What units should I use?
A: Any consistent units (inches, feet, meters), as long as both rise and run use the same unit.

Q4: How does slope percentage relate to degrees?
A: Degrees = arctan(rise/run). A 100% slope equals 45 degrees.

Q5: What's a typical driveway slope?
A: Typically 10-15% maximum for driveways, but local codes may vary.