I was wondering if anyone new the theory, or even more useful, some equations, to figure out how many times a CO2 cylinder with a defined amount of CO2 can fill a chamber with a defined volume to a defined PSI. For example, a 9 oz (avoirdupois ounces) CO2 cylinder, and a chamber with a volume of 188 fl oz to 100 PSI. Either that, or how to find the volume (at atmospheric pressure) of a defined volume of gas pressurized to a defined pressure, and the volume (at atmospheric pressure) of a defined amount of gas or liquid (weighed in avoirdupois ounces).

I want to know this so I can figure out how many times I could fill a potato cannon from a paintball CO2 cylinder.

Thanks!

P.S. If I find out how to do this, I'll write up a calculator/app in C to make it easier for future calculations.

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