1. What is the Elevation Grading Calculator?

The Elevation Grading Calculator calculates the slope percentage between two points based on elevation change and horizontal distance. This is essential for construction, landscaping, and engineering projects where proper grading is critical.

2. How Does the Calculator Work?

The calculator uses the slope formula:

Where:

• Elevation Change — Vertical difference between two points (units)
• Distance — Horizontal distance between two points (units)

Explanation: The formula calculates the ratio of vertical change to horizontal distance, expressed as a percentage.

3. Importance of Slope Calculation

Details: Accurate slope calculation is crucial for proper drainage planning, road construction, building foundations, and ensuring ADA compliance for accessibility.

4. Using the Calculator

Tips: Enter elevation change and distance in consistent units. Both values must be positive numbers. The result will be expressed as a percentage grade.

5. Frequently Asked Questions (FAQ)

Q1: What units should I use for measurement?
A: Use consistent units for both elevation change and distance (feet, meters, etc.). The calculator will work with any unit system as long as both inputs use the same units.

Q2: What is considered a steep slope?
A: Generally, slopes above 15% are considered steep. Slopes over 25% may require special engineering considerations for construction.

Q3: How does slope percentage relate to degrees?
A: Slope percentage is different from angle in degrees. A 45° angle equals a 100% slope. To convert: angle = arctan(slope%/100).

Q4: Why is proper grading important?
A: Proper grading ensures water drainage away from structures, prevents erosion, provides stable foundations, and creates accessible surfaces.

Q5: Can this calculator be used for road grades?
A: Yes, this calculator is suitable for calculating road grades, where typical maximum grades are 6-8% for major roads and up to 15% for local roads.