Capacity Calc

Select your desired units, enter in the values for Tank Displacement and Tank Fill Pressure, and select a Fill Gas. Then press Calculate.

Note: Tank Displacement, Tank Fill Pressure, and Fill Gas all must be filled in for the calculator to work properly.
Tank Displacement:
  
Tank Fill (Gauge) Pressure:
  
Fill Gas:
  Dry Air
 Carbon Dioxide, CO2
 Nitrogen, N2
 Helium, He
Tank Capacity:
  
 

NOTE: The capacity is calculated assuming the temperature of the tank has cooled to 68°F. Thus, the actual capacity of your tank may vary by several percent from this calculator. Higher temperatures will typically hold a lower capacity at the same pressure, while lower temperatures will typically hold a higher capacity.


This tool makes use of data from the "Thermophysical Properties of Fluid Systems" dataset, a part of NIST Standard Reference Database Number 69 (the NIST Chemistry WebBook); additional data was provided from "Thermodynamic Properties of Air and Mixtures of Nitrogen, Argon, and Oxygen from 60 to 2000K at Pressure to 2000 MPa" by Lemmon, Jacobsen, Penoncello, and Friend, J. Phys. Chem. Ref. Data, Vol. 29, No. 3 (2000)