How many ounces in a keg?

A keg's size is measured in gallons, not ounces. The most common keg sizes are:

* 1/6 barrel: 5 gallons (640 ounces)

* 1/4 barrel: 7.75 gallons (990 ounces)

* 1/2 barrel: 15.5 gallons (1,980 ounces)

* Barrel: 31 gallons (3,960 ounces)