In United States customary systems gallon is used as a measure of volume. Many countries have replaced it with liter after metric system has adapted.
In United States customary system there are two types of gallon :
They are different in sizes. Gallon is commonly used volume metric in US used to measure fuel efficiency as miles per gallon. Its abbreviated as gal.
An important thing to note here is that fluid ounces and ounces should not be consider as same. Fluid ounces is a volume metric unit while ounces is a weight metric unit (mass).
Fluid ounces is abbreviated as fl oz and ounces as oz, but in general day to day use no body pays attention to this and use oz i.e ounces as volume metric as well as mass metric as they require.
HOW MANY OUNCES IN A GALLON ( UNITED STATES SYSTEM) ?
Ther are 128 ounces in a gallon based on United States metric system.
Point to remember is that this is for fluid ounces not dry.
1 GALLON [FLUID, US] = 128 OUNCES [FLUID, US]
HOW MANY OUNCES IN A GALLON ( UNITED KINGDOM – UK SYSTEM)
There are 160 ounces in a gallon according to UK – united kingdom systems.
1 GALLON [UK] = 160 OUNCES [UK]
QUICK OUNCES TO GALLON CONVERSION TABLE
If you need to convert a specific amount of ounces into gallon or vice versa then you can try the following converter .