1:20 Slope Calculator

Calculate 1:20 Slope



Formula

To calculate the dimensions of a 1:20 slope:

$$VH = \frac{HD}{20}$$

$$HD = VH \times 20$$

$$SL = \sqrt{HD^2 + VH^2}$$

Where:

What is a 1:20 Slope?

A 1:20 slope is a gradient or incline of a surface where for every 20 units of horizontal distance, there is a 1 unit change in vertical height. This type of slope is often used in construction, landscaping, and civil engineering to ensure proper drainage, accessibility, and to meet building regulations. It is considered a gentle slope that is typically easy to walk up and is wheelchair accessible.

Example Calculation 1

Let's assume the following values:

Using the formula:

$$SL = \sqrt{HD^2 + VH^2} = \sqrt{100^2 + 5^2} = \sqrt{10000 + 25} = \sqrt{10025} \approx 100.12$$ units

Example Calculation 2

Let's assume the following values:

Using the formula:

$$SL = \sqrt{HD^2 + VH^2} = \sqrt{200^2 + 10^2} = \sqrt{40000 + 100} = \sqrt{40100} \approx 200.25$$ units