How Many Ounces In A Gallon
Knowing how many Fluid Ounces are in a Gallon can be very useful as the imperial units of measurement for volume are, unlike the metric system, not decimal!
What’s A Gallon?
A Gallon is an imperial unit of measure commonly used in the United States and several countries of the Commonwealth.
However, like many other imperial units, there are regional variations in how much volume a gallon contains.
- 1 US Gallon contains 3.785 Liters
- 1 Imperial Gallon contains 4.546 Liters
- 1 US Dry Gallon contains 4.404 Liters
However, the definition of a Gallon is common among all users of the unit.
One Gallon equals 8 Pints or 4 Quarts.
It also amounts to 231 cubic inches.
What’s A Fluid Ounce?
A Fluid Ounce, also abbreviated as fl oz, fl. oz. is similarly used in some of the Commonwealth Countries and in the United States.
Its definition varies:
- 1 Imperial Fluid Ounce is 1/20 of an Imperial Pint or 28.41 mL
- 1 US Fluid Ounce is 1/16 of a US Liquid Pint or 29.57 mL
Converting US Gallons To US Ounces
The conversion between a US Gallon and a US Ounce is relatively easy as a US Gallon contains 128 Ounces.
|US Gallons||US Fluid Ounces|
|1 Gallon||128 Fluid Ounces|
|1/2 Gallon||64 Fluid Ounces|
|1/3 Gallon||42 Fluid Ounces + 4 Teaspoons|
|1/4 Gallon||32 Fluid Ounces|
|1/8 Gallon||16 Fluid Ounces|
|1/16 Gallon||8 Fluid Ounces|
|1/32 Gallon||4 Fluid Ounces|
|1/64 Gallon||2 Fluid Ounces|
|1/128 Gallon||1 Fluid Ounce|
Converting Imperial Gallons To Imperial Ounces
Similarly to converting US Gallons, Imperial Gallons obey a simple rule. One Imperial Gallon contains 160 Imperial Fluid Ounces.
|Imperial Gallons||Imperial Fluid Ounces|
|1 Gallon||160 Fluid Ounces|
|1/2 Gallon||80 Fluid Ounces|
|1/3 Gallon||53 Fluid Ounces + 1.5 Teaspoons|
|1/4 Gallon||40 Fluid Ounces|
|1/8 Gallon||20 Fluid Ounces|
|1/16 Gallon||10 Fluid Ounces|
|1/32 Gallon||5 Fluid Ounces|
|1/64 Gallon||2.5 Fluid Ounces|
|1/128 Gallon||1.25 Fluid Ounce|
Frequently Asked Questions
No, one US Gallon contains 128 fluid ounces.
There are 16 times 8 fl oz in one US Gallon.
In the English Imperial Unit system, there are 20 times 8 Imperial Fluid Ounces per Imperial Gallon.
There are 8 times 16 oz in a US Gallon.
1 US Gallon means 128 US Fluid Ounces or 3.785 Liters.
1 Imperial Gallon means 160 Imperial Fluid Ounces or 4.546 Liters
One US Gallon contains approximately 3.785 Liters.
One Imperial Gallon contains 4.546 Liters.
You can fit 64 fluid ounces twice in a gallon.
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