1. What Is Slope Percentage?

Slope percentage is a way to express the incline or decline of a surface as a ratio of vertical rise to horizontal run, multiplied by 100. A 1.5% slope means a 1.5 unit vertical change for every 100 units of horizontal distance.

2. How Does the Calculator Work?

The calculator uses the slope conversion formula:

Where:

• 1.5 — Slope percentage (%)
• 100 — Conversion factor for percentage
• 12 — Inches in a foot (inches/foot)

Explanation: This formula converts a percentage slope to inches of rise per foot of run, which is a common measurement in construction and engineering.

3. Importance of Slope Calculation

Details: Accurate slope calculation is crucial for proper drainage, road construction, ramp design, and ensuring water flows away from structures to prevent water damage.

4. Using the Calculator

Tips: This calculator is preset to calculate the inches per foot for a 1.5% slope. Simply click the calculate button to see the result.

5. Frequently Asked Questions (FAQ)

Q1: What does 1.5% slope mean in practical terms?
A: A 1.5% slope means for every 100 feet of horizontal distance, the elevation changes by 1.5 feet vertically.

Q2: Why convert percentage slope to inches per foot?
A: Many construction projects use inches per foot as a more practical measurement for on-site implementation and verification.

Q3: Is 1.5% slope sufficient for drainage?
A: For most applications, a 1.5% slope (0.18 inches per foot) provides adequate drainage for surfaces like parking lots, sidewalks, and roads.

Q4: Can I calculate other slope percentages with this calculator?
A: This calculator is specifically designed for 1.5% slope. For other percentages, you would need to modify the formula accordingly.

Q5: How accurate is this conversion?
A: The conversion is mathematically precise. The result is rounded to three decimal places for practical use.