How to Calculate SCFM

If ACFM in English Units Is Known

• 1

  Divide the actual pressure by the standard pressure.

• 2

  Divide the standard temperature by the actual temperature.

• 3

  Multiply these two results by ACFM to get the SCFM.

If ACFM in Metric Units Is Known

• 4

  If you have the ACFM in metric units, such as absolute pressure units and temperature in Kelvin, the SCFM equation becomes the SCF. The ACFM becomes the ACF. The SCF is calculated using the following method.

  First, divide the actual pressure by the standard pressure.

• 5

  Divide the standard temperature by the actual temperature.

• 6

  Multiply these two results by ACF.

• 7

  The result is called the SCF. This is the metric equivalent to the SCFM

To Calculate SCFM from the Inlet Cubic Feet Per Minute Value

• 8

  Divide the actual air pressure by the air pressure recorded in the air flow after inlet or filter.

• 9

  Divide the temperature at the inlet by the actual environmental temperature.

• 10

  Multiple these two results with the ICFM value. The result of this is the SCFM.