Convert Forties of Beer to Gallons

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

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Result in Gallons:

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1 forty = 0.3125 gal

Do you want to convert gallons to forties?

How to Convert Forties to Gallons

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Joe is the creator of Inch Calculator and has over 20 years of experience in engineering and construction. He holds several degrees and certifications.

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To convert a measurement in forties to a measurement in gallons, multiply the beer volume by the following conversion ratio: 0.3125 gallons/forty.

Since one forty is equal to 0.3125 gallons, you can use this simple formula to convert:

gallons = forties × 0.3125

The beer volume in gallons is equal to the beer volume in forties multiplied by 0.3125.

For example, here's how to convert 5 forties to gallons using the formula above.
gallons = (5 forties × 0.3125) = 1.5625 gal

How Many Gallons Are in a Forty?

There are 0.3125 gallons in a forty, which is why we use this value in the formula above.

1 forties = 0.3125 gal

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

What Is a Forty?

The forty is a US standard size bottle containing a 40 fl. oz. of beer. This size bottle is commonly associated with lower quality beer, but that is not always the case.

The forty is a US customary unit of beer volume.

Learn more about forties.

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.

Forty to Gallon Conversion Table

Table showing various forty measurements converted to gallons.
Forties Gallons
1 0.3125 gal
2 0.625 gal
3 0.9375 gal
4 1.25 gal
5 1.5625 gal
6 1.875 gal
7 2.1875 gal
8 2.5 gal
9 2.8125 gal
10 3.125 gal
11 3.4375 gal
12 3.75 gal
13 4.0625 gal
14 4.375 gal
15 4.6875 gal
16 5 gal
17 5.3125 gal
18 5.625 gal
19 5.9375 gal
20 6.25 gal
21 6.5625 gal
22 6.875 gal
23 7.1875 gal
24 7.5 gal
25 7.8125 gal
26 8.125 gal
27 8.4375 gal
28 8.75 gal
29 9.0625 gal
30 9.375 gal
31 9.6875 gal
32 10 gal
33 10.31 gal
34 10.63 gal
35 10.94 gal
36 11.25 gal
37 11.56 gal
38 11.88 gal
39 12.19 gal
40 12.5 gal

More Forty & Gallon Conversions