1. What is Slope Percentage?

Slope percentage is a measurement that expresses the steepness of an incline as a percentage. It represents the vertical rise divided by the horizontal run, multiplied by 100 to convert to a percentage.

2. How Does the Calculator Work?

The calculator uses the slope percentage formula:

Where:

• \( Rise \) — Vertical height difference (inches)
• \( Run \) — Horizontal distance (inches)
• \( 100 \) — Conversion factor to percentage

Explanation: For a standard 1 inch per foot slope, the rise is 1 inch and the run is 12 inches (1 foot), resulting in approximately 8.33% slope.

3. Importance of Slope Calculation

Details: Slope percentage calculations are essential in construction, landscaping, road design, and drainage planning to ensure proper water runoff and structural stability.

4. Using the Calculator

Tips: Enter the vertical rise and horizontal run in inches. Both values must be positive numbers greater than zero. The calculator will automatically compute the slope percentage.

5. Frequently Asked Questions (FAQ)

Q1: What is a 1:12 slope percentage?
A: A 1:12 slope (1 inch rise per 12 inches run) equals approximately 8.33% slope.

Q2: How is slope percentage different from slope ratio?
A: Slope ratio expresses the relationship as a ratio (e.g., 1:12), while slope percentage converts this to a percentage value (8.33%).

Q3: What slope percentage is required for proper drainage?
A: For most applications, a minimum slope of 2% (1/4 inch per foot) is recommended for proper drainage.

Q4: Can I use different units of measurement?
A: Yes, as long as both rise and run use the same units, the calculation will be accurate.

Q5: How accurate is this calculation for construction projects?
A: This provides a mathematical calculation of slope percentage. For construction projects, always verify with appropriate surveying equipment and follow local building codes.