1. What Is A 1:20 Slope?

A 1:20 slope means that for every 20 units of horizontal distance (run), there is 1 unit of vertical rise. This is equivalent to a 5% grade or an angle of approximately 2.86 degrees. This slope is commonly used in construction, landscaping, and engineering for drainage systems, ramps, and road design.

2. How Does The Calculator Work?

The calculator uses the slope formula:

Where:

• \( y_2, y_1 \) — Vertical coordinates (rise)
• \( x_2, x_1 \) — Horizontal coordinates (run)
• A 1:20 slope equals 0.05 (1÷20)

Explanation: The calculator determines if the measured slope between two points matches the standard 1:20 ratio commonly used in various applications.

3. Importance Of Slope Calculation

Details: Accurate slope calculation is essential for proper drainage, accessibility compliance, structural integrity, and safety in construction projects. A 1:20 slope is particularly important for wheelchair ramps, road gradients, and water drainage systems.

4. Using The Calculator

Tips: Enter the coordinates of two points in meters. The calculator will compute the slope and determine if it matches a 1:20 ratio (within a small tolerance). All values must be valid numerical inputs.

5. Frequently Asked Questions (FAQ)

Q1: What does a 1:20 slope represent in percentage?
A: A 1:20 slope equals a 5% grade (1÷20 × 100 = 5%).

Q2: Where is a 1:20 slope commonly used?
A: This slope is frequently used for wheelchair ramps, road drainage, landscape grading, and roof pitches where minimal slope is needed for water runoff.

Q3: How accurate does the slope need to be?
A: For most applications, the slope should be within ±0.5% of the target 5% grade to function properly.

Q4: Can I use different units of measurement?
A: Yes, as long as you use consistent units for all measurements (e.g., all in meters, all in feet).

Q5: What's the difference between slope ratio and slope percentage?
A: Slope ratio (1:20) represents the relationship between rise and run, while slope percentage (5%) expresses the rise as a percentage of the run.