1. What is Rise Over Run?

The rise over run is a mathematical concept used to calculate the slope of a line. It represents the ratio of vertical change (rise) to horizontal change (run) between two points on a line.

2. How Does the Calculator Work?

The calculator uses the slope formula:

Where:

• \( Rise \) — Vertical change (inches)
• \( Run \) — Horizontal change (inches)

Additional Calculations:

• Angle = arctan(Slope) converted to degrees
• Grade = Slope × 100%

3. Importance of Slope Calculation

Details: Slope calculation is essential in construction, roofing, road design, wheelchair ramp construction, and many engineering applications where proper incline is critical for safety and functionality.

4. Using the Calculator

Tips: Enter the vertical rise and horizontal run in inches. Both values must be positive numbers. The calculator will provide the slope ratio, angle in degrees, and percentage grade.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between slope and grade?
A: Slope is the ratio of rise to run (e.g., 1:4), while grade is the slope expressed as a percentage (e.g., 25%).

Q2: What is considered a steep slope?
A: In construction, slopes greater than 15 degrees (about 26.8% grade) are generally considered steep.

Q3: How do I measure rise and run in the field?
A: Use a level and measuring tape - measure vertical distance from level to point (rise) and horizontal distance between points (run).

Q4: What's the maximum slope for a wheelchair ramp?
A: ADA recommends 1:12 slope (4.8° or 8.3% grade) maximum for wheelchair ramps.

Q5: Can I use different units than inches?
A: Yes, as long as both rise and run are in the same units, the ratio will be correct.