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Weight of air at 100 PSI

  1. Mar 14, 2007 #1
    Some friends and I were moving a 30 gallon air compressor and after we moved it decided it would have been better to let the air out first. I would like to know how much more the tank weighs with it full of air at 100 PSI. Is there a simple formula to use to make this calculation?

    Thanks so much for your help.
    Shawn Boyers
  2. jcsd
  3. Mar 14, 2007 #2


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    Staff: Mentor

    Well, the density of air at sea level pressure (14.7 psi) is .075 lb/ft^3 and there are 7.46 gal/ cu ft...
  4. Mar 14, 2007 #3


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    Science Advisor

    Ideal gas law...
  5. Mar 15, 2007 #4


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    2 pounds :smile:
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