1. What is Grade Slope?

Grade Slope (GS) represents the steepness or incline of a surface, expressed as a percentage. It is calculated as the ratio of vertical rise to horizontal run, multiplied by 100.

2. How Does the Calculator Work?

The calculator uses the Grade Slope formula:

Where:

• \( R \) — Vertical rise (units)
• \( Run \) — Horizontal run (units)

Explanation: The formula calculates the percentage of slope by comparing the vertical change to the horizontal distance.

3. Importance of Grade Slope Calculation

Details: Grade slope calculation is essential in construction, civil engineering, landscaping, and road design to ensure proper drainage, accessibility, and structural stability.

4. Using the Calculator

Tips: Enter both rise and run values in the same units (feet, meters, etc.). Both values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is considered a steep slope?
A: Generally, slopes above 15-20% are considered steep, while slopes above 30% may require special engineering considerations.

Q2: How is grade slope different from angle?
A: Grade slope is expressed as a percentage, while angle is measured in degrees. They are related but represent the incline differently.

Q3: What are common applications of grade slope?
A: Road construction, wheelchair ramps, roof pitches, drainage systems, and landscape grading all use grade slope calculations.

Q4: Can grade slope be negative?
A: While the calculation typically produces positive values, negative values can indicate downward slopes in specific coordinate systems.

Q5: What units should I use for rise and run?
A: Use consistent units (both in feet, both in meters, etc.). The percentage result will be the same regardless of the unit system used.