Gas Calculator (Gas Phase)

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Gas calculator for Air, Argon, Carbonmonoxide, Compressed Natural Gas (CNG), Helium, Hydrogen, Methane, Nitrogen and Oxygen.

Temperature (STP): deg F (at Standard Temperature & Pressure)
Pressure: psig (pressure rating of the container)
Water Volume: cu.ft.
Temperature: deg F

Please enter or select all values and submit

This calculator calculates the following:

  • Density at given Temperature and Pressure
  • Density at Standard Temperature and Pressure (STP)
  • Compressibility factor at given Temperature and Pressure
  • Product Volume at Standard Temperature and Pressure (STP)
  • Product Weight

  • Water Volume is the volume of the cylinder at STP. This value is used to determine Product Volume & Weight. Enter 0 if water volume is not known.
  • Temperature (STP) for DOT cylinder is 70 deg F and for UN cylinder is 59 deg F. Use same value in Temperature field to find volume and weight at STP.