1. What is Slope Calculation?

Slope calculation determines the steepness or gradient of a surface, expressed as the ratio of vertical rise to horizontal run. In construction and engineering, slope is commonly measured in inches per foot to ensure proper drainage and structural integrity.

2. How Does the Calculator Work?

The calculator uses the slope formula:

Where:

• \( Rise \) — Vertical height difference (inches)
• \( Run \) — Horizontal distance (feet)
• \( 12 \) — Conversion factor from feet to inches

Explanation: The formula converts the rise-run ratio to inches per foot, which is the standard unit for slope measurement in many construction applications.

3. Importance of Slope Calculation

Details: Accurate slope calculation is essential for proper drainage systems, roof construction, road design, wheelchair ramps, and ensuring water flows away from structures to prevent damage.

4. Using the Calculator

Tips: Enter rise in inches and run in feet. Both values must be positive numbers. The calculator will provide the slope in inches per foot.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical slope for drainage?
A: For proper drainage, a minimum slope of 1/4 inch per foot is recommended, though 1/2 inch per foot is often preferred for better water flow.

Q2: How is slope different from grade?
A: Slope is typically expressed as a ratio (e.g., 1:12) or in inches per foot, while grade is usually expressed as a percentage of the slope.

Q3: What slope is required for wheelchair ramps?
A: ADA guidelines require a maximum slope of 1:12 (1 inch of rise per 12 inches of run) for wheelchair ramps.

Q4: Can I calculate slope with different units?
A: Yes, but you'll need to convert all measurements to consistent units before applying the formula.

Q5: What is zero slope?
A: Zero slope indicates a perfectly flat surface with no elevation change over the horizontal distance.