1. What is Slope Ratio?

The slope ratio represents the steepness or incline of a surface, calculated as the ratio of vertical rise to horizontal run. It's commonly used in construction, landscaping, and engineering to describe gradients.

2. How Does the Calculator Work?

The calculator uses the basic slope formula:

Where:

• \( \text{Rise} \) — Vertical height change (in feet)
• \( \text{Run} \) — Horizontal distance (in feet)

Additional Calculations: The calculator also converts the slope ratio to degrees and percentage for different applications.

3. Importance of Slope Calculation

Details: Accurate slope measurement is crucial for proper drainage, accessibility compliance, structural stability, and safety in construction projects.

4. Using the Calculator

Tips: Enter the vertical rise and horizontal run in feet. Both values must be positive numbers. The calculator will provide the slope ratio (as X:1), angle in degrees, and percentage grade.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between slope ratio and slope percentage?
A: Slope ratio is expressed as rise:run (e.g., 1:4), while percentage is (rise/run)×100 (e.g., 25%).

Q2: What is considered a steep slope?
A: Generally, slopes above 15% (about 8.5°) are considered steep for walking, while slopes above 33% (about 18°) are steep for construction.

Q3: How do I measure rise and run in the field?
A: Use a level and measuring tape for small areas, or surveying equipment for larger projects. Digital inclinometers can also measure slope directly.

Q4: What's the maximum slope for wheelchair accessibility?
A: ADA guidelines recommend a maximum slope of 1:12 (8.33%) for wheelchair ramps.

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