Convert Gallons of Beer to Fluid Ounces

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


Result in Fluid Ounces:

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1 gal = 128 fl oz

Do you want to convert fluid ounces to gallons?

How to Convert Gallons to Fluid Ounces

To convert a measurement in gallons to a measurement in fluid ounces, multiply 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:

fluid ounces = gallons × 128

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

For example, here's how to convert 5 gallons to fluid ounces using the formula above.
fluid ounces = (5 gal × 128) = 640 fl oz

How Many Fluid Ounces Are in a Gallon?

There are 128 fluid ounces in a gallon, which is why we use this value in the formula above.

1 gal = 128 fl oz

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

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.

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.

Gallon to Fluid Ounce Conversion Table

Table showing various gallon measurements converted to fluid ounces.
Gallons Fluid Ounces
1 gal 128 fl oz
2 gal 256 fl oz
3 gal 384 fl oz
4 gal 512 fl oz
5 gal 640 fl oz
6 gal 768 fl oz
7 gal 896 fl oz
8 gal 1,024 fl oz
9 gal 1,152 fl oz
10 gal 1,280 fl oz
11 gal 1,408 fl oz
12 gal 1,536 fl oz
13 gal 1,664 fl oz
14 gal 1,792 fl oz
15 gal 1,920 fl oz
16 gal 2,048 fl oz
17 gal 2,176 fl oz
18 gal 2,304 fl oz
19 gal 2,432 fl oz
20 gal 2,560 fl oz
21 gal 2,688 fl oz
22 gal 2,816 fl oz
23 gal 2,944 fl oz
24 gal 3,072 fl oz
25 gal 3,200 fl oz
26 gal 3,328 fl oz
27 gal 3,456 fl oz
28 gal 3,584 fl oz
29 gal 3,712 fl oz
30 gal 3,840 fl oz
31 gal 3,968 fl oz
32 gal 4,096 fl oz
33 gal 4,224 fl oz
34 gal 4,352 fl oz
35 gal 4,480 fl oz
36 gal 4,608 fl oz
37 gal 4,736 fl oz
38 gal 4,864 fl oz
39 gal 4,992 fl oz
40 gal 5,120 fl oz

More Gallon & Fluid Ounce Conversions