Enter the airflow rate (CFM) and the filter area (ft^2) into the Air to Cloth Ratio Calculator. The calculator will evaluate the Air to Cloth Ratio.

## Air to Cloth Ratio Formula

The following two example problems outline the steps and information needed to calculate the Air to Cloth Ratio.

ACR = AF / FA

Variables:

- ACR is the Air to Cloth Ratio (CFM/ft^2)
- AF is the airflow rate (CFM)
- FA is the filter area (ft^2)

To calculate the air to cloth ratio, divide the airflow rate by the filter area.

## How to Calculate Air to Cloth Ratio?

The following steps outline how to calculate the Air to Cloth Ratio.

- First, determine the airflow rate (CFM).
- Next, determine the filter area (ft^2).
- Next, gather the formula from above = ACR = AF / FA.
- Finally, calculate the Air to Cloth Ratio.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

airflow rate (CFM) = 30

filter area (ft^2) = 2

ACR = AF / FA** **= ?