Convert Gallons to Forties

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

Results in Forties:
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1 gallon = 3.2 forties
Do you want to convert forties to gallons?

How to Convert Gallons to Forties

To convert a gallon measurement to a forty measurement, multiply the beer volume by the conversion ratio. One gallon is equal to 3.2 forties, so use this simple formula to convert:

forties = gallons × 3.2

The beer volume in forties is equal to the gallons multiplied by 3.2.

For example, here's how to convert 5 gallons to forties using the formula above.
5 gallons = (5 × 3.2) = 16 forties

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


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

The gallon is a US customary unit of beer volume.


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.

Gallon Measurements and Equivalent Forty Conversions

Common gallon values converted to the equivalent forty value
Gallons Forties
1 3.2
2 6.4
3 9.6
4 12.8
5 16
6 19.2
7 22.4
8 25.6
9 28.8
10 32
11 35.2
12 38.4
13 41.6
14 44.8
15 48
16 51.2
17 54.4
18 57.6
19 60.8
20 64
21 67.2
22 70.4
23 73.6
24 76.8
25 80
26 83.2
27 86.4
28 89.6
29 92.8
30 96
31 99.2
32 102.4
33 105.6
34 108.8
35 112
36 115.2
37 118.4
38 121.6
39 124.8
40 128

More Gallon Beer Volume Conversions

Convert to Beer Barrels
1 gallon is equal to 0.032258 beer barrels
Convert to Beers
1 gallon is equal to 10.666667 beers
Convert to Bombers
1 gallon is equal to 5.818182 bombers
Convert to Cases
1 gallon is equal to 0.444444 cases
Convert to Growlers
1 gallon is equal to 2 growlers
Convert to Half Barrel Kegs
1 gallon is equal to 0.064516 half barrel kegs
Convert to Quarter Barrel Kegs
1 gallon is equal to 0.129032 quarter barrel kegs
Convert to Liters
1 gallon is equal to 3.785414 liters
Convert to Fluid Ounces
1 gallon is equal to 128 fluid ounces
Convert to Pints
1 gallon is equal to 8 pints
Convert to Quarts
1 gallon is equal to 4 quarts
Convert to Six Packs
1 gallon is equal to 1.777778 six packs

Unit of Measurement Conversion Made Easy!

There are thousands of units of measure in use across the globe, and converting from one to another can be very difficult since each conversion requires a different formula to derive the result. Our unit of measurement conversion tools are meant to be dead easy. We break the mold of the typical dry and complicated experience. In addition to converting from one measurement to another, we provide the formula so you can see how the conversion is done, use it on you’re own calculator if you need to!

Convert units of length, weight, volume, and area between imperial and metric measures

Understanding the Metric System

The metric system makes it relatively easy to convert from one metric unit to another metric unit. The metric system uses a base unit, think meters or grams, and a prefix such as kilo or milli. The prefixes differ from the base units by differing powers of 10. So to convert within the metric system it’s usually a matter of multiplying or dividing by one of the powers of 10.

Here is a list of some of the common metric prefixes:

  • “kilo” – 1,000x larger
  • “hecto” – 100x larger
  • “deca” – 10x larger
  • “deci” – 10x smaller
  • “centi” – 100x smaller
  • “milli” – 1,000x smaller

There is a helpful mnemonic for remembering the prefixes: “King Henry Died Until Drinking Chocolate Milk.”
The u in Until refers to the base unit.