how many oz in a gallon jug?
<answer> 1 US gallon is equals to 7.57 bottles, so 1 US gallon = 16.9 US fluid ounces. <context> The US gallon. A fluid ounce in the US is defined as a 1/128th of a US gallon, meaning that 128 / 16.9 = 7.57 bottles containing 16.9 US fluid ounces of water each will make up exactly 1 US gallon. The Imperial gallon.