How Many People does a Gallon of Coffee Serve?
A cup of coffee, if you go by the coffee pot servings, is 6 ounces. There are 128 ounces to a gallon, so 128/6 would be 21.33 servings. You should take into consideration, however, that most people actually drink a lot more coffee than 6 ounces. I would count on 10 ounces per person. So, a gallon of coffee would now hold 12.8 servings.