Question: 1/2 gallon of water is how many ounces?
Answer: Now, how many ounces are in half a gallon? The answer is simple; there is 64 oz in half a gallon. Always keep in mind that ounces are denoted by symbol “oz” whereas fluid ounces are denoting by symbol “fl oz.” In the simple words, 16 cups of water make up to the one gallon.