1. What is Slope Percentage?

Slope percentage is a way to express the steepness of a slope as a ratio of vertical rise to horizontal run, multiplied by 100 to convert it to a percentage. It's commonly used in construction, landscaping, and engineering.

2. How Does the Calculator Work?

The calculator uses the slope percentage formula:

Where:

• \( Rise \) — Vertical change (height difference)
• \( Run \) — Horizontal distance

Explanation: The formula calculates how much elevation changes over a given horizontal distance, expressed as a percentage.

3. Importance of Slope Calculation

Details: Slope percentage is crucial for designing roads, drainage systems, wheelchair ramps, and determining land usability. It affects construction methods and material choices.

4. Using the Calculator

Tips: Enter rise and run in the same units (feet, meters, etc.). Both values must be positive numbers. The calculator will output the slope percentage.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between slope percentage and slope angle?
A: Slope percentage is a ratio (rise/run×100), while slope angle is the angle in degrees between the slope and horizontal.

Q2: What is considered a steep slope?
A: Generally, slopes over 15% are considered steep, but this depends on context. For wheelchair ramps, maximum is 8.33%.

Q3: How do I measure rise and run in the field?
A: Use a level and measuring tape, or modern tools like laser levels or smartphone apps with inclinometers.

Q4: Can slope percentage be more than 100%?
A: Yes, when rise exceeds run (angle > 45°), slope percentage exceeds 100%. A 100% slope means 45° angle.

Q5: How does this relate to grade in construction?
A: Grade is essentially the same as slope percentage, often used interchangeably in construction contexts.