1. What is Slope Calculation?

Slope calculation determines the steepness or incline between two points, expressed as a ratio, percentage, or angle. It's essential in construction, landscaping, and civil engineering projects.

2. How Does the Calculator Work?

The calculator uses the slope formula:

Where:

• \( y_1, y_2 \) — Elevation at two points (feet)
• \( x_1, x_2 \) — Horizontal distance at two points (feet)

Explanation: The formula calculates the ratio of vertical change (rise) to horizontal change (run) between two points.

3. Importance of Slope Calculation

Details: Accurate slope measurement is crucial for proper drainage, road construction, wheelchair ramp design, and preventing erosion.

4. Using the Calculator

Tips: Enter elevations in feet and horizontal distances in feet. Ensure x₂ is greater than x₁ to avoid division by zero.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between slope ratio and percentage?
A: Ratio expresses slope as (1:value) while percentage is (value%). 1:4 ratio equals 25% slope.

Q2: What is considered a steep slope?
A: Generally, slopes above 15% (1:6.67) are considered steep for construction purposes.

Q3: How do I measure slope in the field?
A: Use a level and measuring tape for small areas, or GPS/survey equipment for larger areas.

Q4: What's the maximum slope for ADA compliance?
A: ADA requires wheelchair ramps to have a maximum 1:12 slope (8.33%).

Q5: How does slope affect drainage?
A: Minimum 2% slope (1:50) is recommended for proper surface drainage.