1. What is Slope Calculation?

Slope calculation converts percentage grade to decimal slope (rise over run). This is commonly used in civil engineering, construction, and road design to express incline or decline.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( Percentage \) — The percentage grade (e.g., 5% grade)
• \( Slope \) — The resulting decimal slope (e.g., 0.05)

Explanation: A 1% grade equals a slope of 0.01, meaning 1 unit of vertical rise for every 100 units of horizontal run.

3. Importance of Slope Calculation

Details: Accurate slope calculation is essential for road design, drainage systems, wheelchair ramps, roof pitches, and ensuring proper water runoff in construction projects.

4. Using the Calculator

Tips: Enter the percentage value (e.g., 5 for 5% grade). The calculator will automatically convert it to decimal slope format.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between percentage and slope?
A: Percentage is vertical rise per 100 units horizontal, while slope is the ratio of rise to run (e.g., 5% = 5:100 = 0.05 slope).

Q2: What are common slope percentages?
A: Roads typically 2-8%, wheelchair ramps 5-8.33%, roof pitches vary by material (flat roofs 1-10%, steep roofs 25%+).

Q3: How do I convert slope back to percentage?
A: Multiply the decimal slope by 100 (e.g., 0.05 slope × 100 = 5%).

Q4: What's the maximum slope for accessibility?
A: ADA requires maximum 8.33% slope (1:12 ratio) for wheelchair ramps.

Q5: When is slope calculation critical?
A: Critical in civil engineering for road safety, construction for structural integrity, and landscaping for proper drainage.