Enter the difference in elevation between edges (ft) and the lane width (ft) into the Cross Slope Calculator. The calculator will evaluate and display the Cross Slope.

## Cross Slope Formula

The following formula is used to calculate the Cross Slope.

**CS = E / W * 100**

- Where CS is the Cross Slope (%)
- E is the difference in elevation between edges (ft)
- W is the lane width (ft)

## How to Calculate Cross Slope?

The following example problems outline how to calculate Cross Slope.

Example Problem #1:

- First, determine the difference in elevation between edges (ft).
- The difference in elevation between edges (ft) is given as: 2.5.

- Next, determine the lane width (ft).
- The lane width (ft) is provided as: 50.

- Finally, calculate the Cross Slope using the equation above:

CS = E / W * 100

The values given above are inserted into the equation below and the solution is calculated:

CS = 2.5 / 50 * 100 = 5.00 (%)

Example Problem #2:** **

For this problem, the variables needed are provided below:

difference in elevation between edges (ft) = 6.7

lane width (ft) = 198

This example problem is a test of your knowledge on the subject. Use the calculator above to check your answer.

CS = E / W * 100** = ?**