SCFM Calculator
Convert actual volumetric flow to standard conditions
Instructions
1
Enter ACFM
Actual volumetric flow at operating conditions.
2
Enter Pressure (psia)
Use absolute pressure, not gauge.
3
Enter Temperature (°F)
Ambient gas temperature at the meter.
Formula
SCFM = ACFM · (P / Pₛₜd) · (Tₛₜd / T)
Pₛₜd = 14.696 psia, Tₛₜd = 60°F (520°R); T = °F + 459.67
Note: Ignores compressibility (Z ≈ 1); acceptable for low pressure gases.
About SCFM
SCFM represents volumetric flow normalized to standard conditions, enabling fair comparison between systems measured at different pressures and temperatures.
Common Questions
Is there a single standard?
Standards vary (e.g., 60°F vs 68°F). This tool uses 60°F and 14.696 psia.
What about compressibility?
For high pressure/velocity gases, include Z; we assume Z ≈ 1 here.