Enter the patio vertical drop  and the patio width into the Patio Fall Ratio Calculator. The calculator will evaluate and display the Patio Fall Ratio.

## Patio Fall Ratio Formula

The following formula is used to calculate the Patio Fall Ratio.

PATR = D / W
• Where PATR is the Patio Fall Ratio
• D is the patio vertical drop
• W is the patio width

To calculate a patio fall ratio, divide the patio vertical drop by the patio width.

## How to Calculate Patio Fall Ratio?

The following example problems outline how to calculate Patio Fall Ratio.

Example Problem #1:

1. First, determine the patio vertical drop .
• The patio vertical drop  is given as: 5.
2. Next, determine the patio width.
• The patio width is provided as: 150.
3. Finally, calculate the Patio Fall Ratio using the equation above:

PATR = D / W

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

PATR = 5 / 150 = .033 = 3.33%

Example Problem #2:

For this problem, the variables required are provided below:

patio vertical drop  = 6

patio width = 200