How many gallons ice tea to serve 70?

To determine how many gallons of iced tea to serve 70 people, a good rule of thumb is to estimate about 1 cup (8 ounces) per person. This translates to approximately 5.5 gallons for 70 people, considering that there are 128 ounces in a gallon. Therefore, serving around 5 to 6 gallons of iced tea should be sufficient for your gathering. Adjustments can be made based on guests' preferences and whether other beverages are also being served.