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Calculation Machine

ACFM to SCFM Calculator

Actual to standard cubic feet per minute.

Reviewed by the Calculation Machine team · How we check our maths

Your values

ⓘ Live results

Results
Standard airflow
523.8 SCFM
Correction factor
0.873
Mass flow
39.3 lb/min
Actual airflow
600 ACFM

Quick answer

SCFM converts actual measured volume back to a common reference so mass flow can be compared fairly.

The formula

SCFM = ACFM x (Pact/Pstd) x (Tstd/Tact)

Worked example

Worked example

Using the values the calculator loads with.

Inputs

  • Actual airflow600 ACFM
  • Actual temperature45 °C
  • Actual pressure96 kPa

Result

  • Standard airflow523.8 SCFM
  • Correction factor0.873
  • Mass flow39.3 lb/min
  • Actual airflow600 ACFM

How to use the ACFM to SCFM Calculator

  1. 1Enter the airflow you measured on site.
  2. 2Add the actual temperature and pressure at the measuring point.
  3. 3Use SCFM whenever you compare against rated capacity.

Frequently asked questions

Compressor ratings?

Compressor CFM is nearly always SCFM, so convert before comparing to a tool's actual demand.

Big difference?

At 1,500 m and 45°C the gap can exceed 20%.

About this calculator