Convert Fluid Ounces of Beer to Gallons

Enter the beer volume in fluid ounces below to get the value converted to gallons.

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Result in Gallons:

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1 fl oz = 0.007813 gal

Do you want to convert gallons to fluid ounces?

How to Convert Fluid Ounces to Gallons

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To convert a measurement in fluid ounces to a measurement in gallons, divide the beer volume by the following conversion ratio: 128 fluid ounces/gallon.

Since one gallon is equal to 128 fluid ounces, you can use this simple formula to convert:

gallons = fluid ounces ÷ 128

The beer volume in gallons is equal to the beer volume in fluid ounces divided by 128.

For example, here's how to convert 500 fluid ounces to gallons using the formula above.
gallons = (500 fl oz ÷ 128) = 3.90625 gal

Fluid ounces and gallons are both units used to measure beer volume. Keep reading to learn more about each unit of measure.

What Is a Fluid Ounce?

In the US, beer is often measured by the fluid ounce, which is the basis for other units of beer volume measure. The standard US bottle of beer contains 12 fluid ounces.

The fluid ounce is a US customary unit of volume. Fluid ounces can be abbreviated as fl oz, and are also sometimes abbreviated as oz fl. For example, 1 fluid ounce can be written as 1 fl oz or 1 oz fl.

Learn more about fluid ounces.

What Is a Gallon?

The US gallon is a standard size equivalent to 128 fl. oz. of beer.

The gallon is a US customary unit of volume. Gallons can be abbreviated as gal; for example, 1 gallon can be written as 1 gal.

Learn more about gallons.

Fluid Ounce to Gallon Conversion Table

Table showing various fluid ounce measurements converted to gallons.
Fluid Ounces Gallons
1 fl oz 0.007813 gal
2 fl oz 0.015625 gal
3 fl oz 0.023438 gal
4 fl oz 0.03125 gal
5 fl oz 0.039063 gal
6 fl oz 0.046875 gal
7 fl oz 0.054688 gal
8 fl oz 0.0625 gal
9 fl oz 0.070313 gal
10 fl oz 0.078125 gal
20 fl oz 0.15625 gal
30 fl oz 0.234375 gal
40 fl oz 0.3125 gal
50 fl oz 0.390625 gal
60 fl oz 0.46875 gal
70 fl oz 0.546875 gal
80 fl oz 0.625 gal
90 fl oz 0.703125 gal
100 fl oz 0.78125 gal
200 fl oz 1.5625 gal
300 fl oz 2.3438 gal
400 fl oz 3.125 gal
500 fl oz 3.9063 gal
600 fl oz 4.6875 gal
700 fl oz 5.4688 gal
800 fl oz 6.25 gal
900 fl oz 7.0313 gal
1,000 fl oz 7.8125 gal

More Fluid Ounce & Gallon Conversions