Variables:

Project Designator: 
Upstream pressure:  psi kPa MPa
Downstream pressure:  (use same units as above)
Flow:   lb/min lb/sec kg/min kg/sec SCFMlb/sec kg/min kg/sec SCFM >
Temperature:    oF oC
Fluid:  air Ammonia gas Chlorine GN2 CO2 He Hydrogen Methane GOX or all of the following:
Molecular weight: 
Specific heat ratio: 
Coefficient of discharge: 

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How this calculator works