Air - SCFM versus ACFM and ICFM

Calculate ACFM (Actual Cubic Feet per Minute) from SCFM (Standard Cubic Feet per Minute) and ICFM (Inlet Cubic Feet per Minute) based on pressure, temperature, and humidity conditions.

Air Temperature (°F)	Air Temperature (°C)	Conversion Factor
0	-17.2	1.152
10	-12.2	1.128
20	-6.7	1.104
30	-1.1	1.082
40	4.4	1.06
50	10	1.039
60	15.6	1.019
70	21.1	1
80	26.7	0.981
90	32.2	0.964
100	37.8	0.946
110	43.3	0.93
120	48.9	0.914
130	54.4	0.898
140	60	0.883
150	65.6	0.869
160	71.1	0.855
170	76.7	0.841

Calculator

Inputs

SCFM (Standard CFM) (CFM)

Standard Pressure (Pstd) (psia)

Actual Pressure (Pact) (psia)

Saturation Pressure (Psat) (psia)

Relative Humidity (Φ) (ratio)

Actual Temperature (Tact) (°R)

Standard Temperature (Tstd) (°R)

Results

ACFM (Actual CFM)-- CFM

Calculator

Inputs

ACFM (Actual CFM) (CFM)

Actual Pressure (Pact) (psia)

Pressure After Filter (Pf) (psia)

Temperature After Filter (Tf) (°R)

Actual Temperature (Tact) (°R)

Results

ICFM (Inlet CFM)-- CFM