how many fluid ounces are there in a gallon?
A US fluid ounce is a unit of volume in US Customary Units. The symbol for US fluid ounce is US fl oz. There are 128 US fluid ounces in a US gallon. A US gallon is a unit of volume in US Customary Units. The symbol for US gallon is US gal. There are 0.0078125 US gallons in a US fluid ounce. Let's take a closer look at the conversion formulas so that you can do these conversions yourself with a calculator or with an old-fashioned pencil and paper.