SCFM to CFM Converter
SCFM (Standard Cubic Feet per Minute) is flow corrected to standard conditions. Actual CFM is the real volumetric flow at the local temperature and pressure. When air is hotter or...
Formula
Source: Engineering Toolbox, CAGI standards | Last reviewed: June 7, 2026
Examples
100 SCFM
= 100 CFM
- T_actual = 70
- P_atm_psi = 14.7
At standard conditions SCFM = CFM
100 SCFM
= 105.8 CFM
- T_actual = 100
- P_atm_psi = 14.7
100 SCFM at 100°F actual temperature
Where is this used?
A compressor rated 100 SCFM at sea level will deliver more actual CFM at higher altitudes.
Use this to ensure downstream components are not undersized.
Frequently Asked Questions
Is CFM the same as ACFM?
Yes, in this context CFM (actual cubic feet per minute) is equivalent to ACFM. Both refer to the actual volumetric flow at site conditions.
Why does the actual CFM increase at higher altitude?
At higher altitude, atmospheric pressure is lower. By the ideal gas law, the same mass of air occupies more volume at lower pressure, so the actual CFM is higher than SCFM.
What standard temperature does this use?
This converter uses 68°F (520°R) as the standard reference temperature, which is the CAGI (Compressed Air and Gas Institute) standard.
Reviewed for accuracy
· Last reviewed: June 7, 2026
All calculations are for reference only. Always verify with manufacturer data and a qualified engineer for critical applications. Learn about our editorial process.