How many kegs of draft beer can a CO2 tank dispense?

There are a few different variables that will influence the answer to this question: size of the keg(s), size of the CO2 tank, pressure in the CO2 tank.

Generally speaking, it takes about 1lb of CO2 to dispense a full 1/2 barrel keg (1 barrel = 31 US gallons / 1/2 barrel = 15.5 gallons). If you're dispensing a smaller keg, we can work backwards from there. It will take about 1/2lb of CO2 to dispense a 1/4 barrel keg (7.75 gallons) and about 1/3lb CO2 to dispense a 5 gallon keg (corny keg / sixtel).

Refer to the chart below to approximate the number of kegs that can be served from different size CO2 tanks.

 


Keg Size / Style
20oz Cylinder 1.5 lb Cylinder 2.5 lb Cylinder 5 lb Cylinder 10 lb Cylinder 15 lb Cylinder 20 lb Cylinder
Corny Keg / Home Brew (5.00 Gallon) 2-3 2-3 7-11 15-22 31-44 46-66 62-87
Sixth Barrel (5.23 Gallon) 1-3 2-3 6-11 14-21 29-42 44-63 59-83
Quarter Barrel (7.75 Gallon) 1-2 2-3 5-7 10-14 20-28 30-42 40-56
Half Barrel (15.50 Gallon) N/A 1 2-4 5-7 10-14 15-21 20-28

* Note that this table should only be used for reference and as an approximation. Actual results may vary.


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