1. What is Gradient Percentage?

Gradient percentage is a measure of slope steepness expressed as a percentage. In paving and construction, it represents the vertical rise per horizontal run, crucial for proper drainage and surface planning.

2. How Does the Calculator Work?

The calculator uses the gradient formula:

Where:

• \( Rise \) — Vertical height difference (meters)
• \( Run \) — Horizontal distance (meters)
• \( 100 \) — Conversion factor to percentage

Explanation: The formula calculates the slope as a percentage by dividing the vertical rise by the horizontal run and multiplying by 100 to convert to percentage.

3. Importance of Gradient Calculation in Paving

Details: Proper gradient calculation is essential for effective water drainage, preventing pooling, ensuring pedestrian safety, and meeting building code requirements in paving projects.

4. Using the Calculator

Tips: Enter rise and run values in meters. Both values must be positive numbers, with run greater than zero. The calculator will provide the gradient percentage for your paving project.

5. Frequently Asked Questions (FAQ)

Q1: What is the recommended gradient for paving?
A: Typically 1-2% gradient is recommended for proper drainage, but specific requirements may vary based on local codes and project specifications.

Q2: How do I measure rise and run accurately?
A: Use a level and measuring tape or laser level for precise measurements. Rise is vertical height difference, run is horizontal distance.

Q3: Can I use different units?
A: The calculator uses meters, but you can convert from other units as long as both rise and run use the same unit of measurement.

Q4: What gradient is too steep for pedestrian areas?
A: Generally, gradients above 5% may be challenging for wheelchair access and pedestrian comfort, while above 8% may require steps or ramps.

Q5: How does gradient affect drainage?
A: Insufficient gradient can cause water pooling, while excessive gradient may cause erosion and rapid water runoff.