How many half gallons in a case of whisky?

A standard case of whisky typically contains 12 bottles. Since a half-gallon is equivalent to 64 ounces and a standard whisky bottle is usually 750 milliliters (about 25.4 ounces), there are no half gallons in a standard case. Instead, each case would have 12 bottles of 750 ml, totaling 9 liters.