How Much Beer is in a Half Keg?

A full keg of beer, also called a half barrel, holds 15.5 U.S. gallons. Therefore, a half keg would be 7.75 gallons. From the half keg, you will be able to serve about 82.6 12 fl oz glasses of beer and 3.45 cases of 24 x 12 fl oz. Look here for more information: