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# How many ounce in a gallon?

Updated: 10/19/2022

Wiki User

β 12y ago

1 Gallon = 128 fluid ounces (volume not weight)

That's a US gallon.

An Imperial gallon is 160 ounces, but the ounces aren't the same size as US ounces. Nevertheless, an Imperial gallon is larger.

Using litres and millilitres to measure volume solves this confusion. (Of course the US doesn't use Imperial gallons, but here in Canada we did prior to going metric.)

Wiki User

β 12y ago

Wiki User

β 6y ago

1 US gallon equals 128 fluid ounces

1 Imperial gallon = 160 Imperial fluid ounces

tanjina sultana

Lvl 1
β 1y ago
1 gallon of water is equal to 160 fluid ounces How many ounces in a half gallon Itβs answer is there are 64 fluid ounces in..

Wiki User

β 9y ago

There are 128 fluid ounces in one US gallon.

Wiki User

β 12y ago

1 gallon = 128 fluid ounces

1 fluid ounce = 0.0078125 gallon

tanjina sultana

Lvl 2
β 1y ago

1 US gallon equals 128 fluid ounces

1 Imperial gallon = 160 Imperial fluid ounces

Wiki User

β 9y ago

A US gallon is 128 ounces