1. What is Gradient Ratio?

Gradient ratio is a dimensionless measure of slope steepness, expressed as the ratio of vertical rise to horizontal run. It is commonly used in civil engineering, road design, and construction to describe inclines.

2. How Does the Calculator Work?

The calculator uses the gradient ratio formula:

Where:

• \( \text{Rise} \) — Vertical height difference (meters)
• \( \text{Run} \) — Horizontal distance (meters)

Explanation: The ratio represents how much vertical elevation changes per unit of horizontal distance.

3. Importance of Gradient Calculation

Details: Gradient ratios are essential for designing accessible routes, drainage systems, and determining vehicle climbing capabilities. They help ensure safety and functionality in various engineering applications.

4. Using the Calculator

Tips: Enter rise and run values in meters. Both values must be positive numbers greater than zero. The result is a unitless ratio.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical gradient ratio for roads?
A: Main roads typically have ratios between 1:20 to 1:10, while steep mountain roads may reach 1:6 or steeper.

Q2: How do I convert ratio to percentage?
A: Multiply the ratio by 100% (e.g., 1:10 ratio = 10% grade).

Q3: What's the difference between ratio and angle?
A: Ratio describes the relationship between rise and run, while angle measures the slope in degrees from horizontal.

Q4: What is the maximum gradient for wheelchair access?
A: Typically 1:12 (8.33%) for ramps, with level landings at regular intervals.

Q5: Can I use different units for rise and run?
A: Yes, as long as both use the same units, the ratio remains valid since it's unitless.