Air-Compressor CFM ↔ SCFM Calculator

Convert between actual and standard cubic feet per minute for compressed air systems.

Conversion Parameters

Conversion Type

Actual CFM Actual cubic feet per minute at operating conditions

Standard CFM (SCFM) Standard cubic feet per minute at standard conditions

Operating Pressure (psig) Gauge pressure at operating conditions

Operating Temperature (°F) Temperature at operating conditions

Altitude (feet above sea level) Affects atmospheric pressure correction

Relative Humidity (%)

Moisture content in air

Conversion Factor:

Atmospheric Pressure:

Absolute Pressure:

Temperature Correction:

CFM (Cubic Feet per Minute): Actual volume flow rate at operating conditions.
SCFM (Standard Cubic Feet per Minute): Volume flow rate normalized to standard conditions (14.7 psia, 68°F, 0% humidity).
Atmospheric Pressure: Decreases with altitude, affecting air density.
Absolute Pressure: Gauge pressure plus atmospheric pressure.
Temperature Effect: Higher temperatures expand air, reducing density.
Humidity Effect: Water vapor displaces air, reducing effective air density.