how much is 128 fl ounces
If the conversion is from U.S. fluid gallons to ounces then there are 128 ounces in a gallon.The commonly converted numbers and the results can be found in the conversion table at the end of the page but for anything else please use the converter below. 1 Gallon [Fluid, US] = 128 Ounces [Fluid, US].t's commonly used unit of volume such as measuring the fuel efficiency as miles per gallon, etc. The abbreviation is gal. Fluid ounce is an imperial and U.S. customary volume unit. Fluid ounces are volume units and should not be mistaken with ounces which is mass (weight) unit. The abbreviation is fl oz.