how many water bottles is a gallon of water

A gallon of water contains approximately 7.57 standard water bottles, assuming each bottle holds about 16.9 ounces (or 500 milliliters) of water. This comes from the fact that one gallon equals 128 fluid ounces, and dividing 128 by 16.9 gives roughly 7.57 bottles per gallon. Depending on the bottle size, the number of bottles per gallon will vary—for example, eight 16.9-ounce bottles, five 24-ounce bottles, four 32-ounce bottles, or three 40-ounce bottles make up a gallon.