1. What is a Percent Grade Slope Calculator?

Definition: This calculator determines the slope percentage (grade) based on the vertical rise and horizontal run measurements.

Purpose: It helps engineers, surveyors, construction workers, and landscapers calculate the steepness of slopes for various projects.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \text{Slope \%} \) — Percentage grade of the slope
• \( \text{Rise} \) — Vertical change (in meters)
• \( \text{Run} \) — Horizontal distance (in meters)

Explanation: The ratio of vertical rise to horizontal run is multiplied by 100 to convert it to a percentage.

3. Importance of Slope Percentage Calculation

Details: Accurate slope calculation is crucial for road construction, wheelchair ramps, drainage systems, and ensuring structural stability.

4. Using the Calculator

Tips: Enter the rise (vertical change) and run (horizontal distance) in meters. Both values must be positive, and run cannot be zero.

5. Frequently Asked Questions (FAQ)

Q1: What does a 10% slope mean?
A: A 10% slope means the elevation changes by 10 units for every 100 units of horizontal distance.

Q2: How is this different from angle in degrees?
A: Percentage grade is the tangent of the angle (rise/run), while degrees measure the actual angle. 100% slope = 45°.

Q3: What's the maximum possible slope percentage?
A: Theoretically unlimited for vertical cliffs, but practical maximum is 100% (45° angle) for most applications.

Q4: Can I use different units?
A: Yes, as long as rise and run use the same units (feet, meters, etc.), the percentage will be correct.

Q5: What's considered a steep slope?
A: Typically slopes above 20% are considered steep, with 30%+ being very steep and challenging for construction.