Convert Forties to Fluid Ounces

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

Results in Fluid Ounces:
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1 forty = 40 fl oz

How to Convert Forties to Fluid Ounces

To convert a forty measurement to a fluid ounce measurement, multiply the beer volume by the conversion ratio. One forty is equal to 40 fluid ounces, so use this simple formula to convert:

fluid ounces = forties × 40

The beer volume in fluid ounces is equal to the forties multiplied by 40.

For example, here's how to convert 5 forties to fluid ounces using the formula above.
5 forties = (5 × 40) = 200 fl oz

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


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.

Fluid Ounces

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 beer volume. Fluid ounces can be abbreviated as fl oz, for example 1 fluid ounce can be written as 1 fl oz.

Forty Measurements and Equivalent Fluid Ounce Conversions

Common forty values converted to the equivalent fluid ounce value
Forties Fluid Ounces
1 40 fl oz
2 80 fl oz
3 120 fl oz
4 160 fl oz
5 200 fl oz
6 240 fl oz
7 280 fl oz
8 320 fl oz
9 360 fl oz
10 400 fl oz
11 440 fl oz
12 480 fl oz
13 520 fl oz
14 560 fl oz
15 600 fl oz
16 640 fl oz
17 680 fl oz
18 720 fl oz
19 760 fl oz
20 800 fl oz
21 840 fl oz
22 880 fl oz
23 920 fl oz
24 960 fl oz
25 1,000 fl oz
26 1,040 fl oz
27 1,080 fl oz
28 1,120 fl oz
29 1,160 fl oz
30 1,200 fl oz
31 1,240 fl oz
32 1,280 fl oz
33 1,320 fl oz
34 1,360 fl oz
35 1,400 fl oz
36 1,440 fl oz
37 1,480 fl oz
38 1,520 fl oz
39 1,560 fl oz
40 1,600 fl oz

More Forty Beer Volume Conversions

Convert to Beer Barrels
1 forty is equal to 0.010081 beer barrels
Convert to Beers
1 forty is equal to 3.333333 beers
Convert to Bombers
1 forty is equal to 1.818182 bombers
Convert to Cases
1 forty is equal to 0.138889 cases
Convert to Gallons
1 forty is equal to 0.3125 gallons
Convert to Growlers
1 forty is equal to 0.625 growlers
Convert to Half Barrel Kegs
1 forty is equal to 0.020161 half barrel kegs
Convert to Quarter Barrel Kegs
1 forty is equal to 0.040323 quarter barrel kegs
Convert to Liters
1 forty is equal to 1.182942 liters
Convert to Pints
1 forty is equal to 2.5 pints
Convert to Quarts
1 forty is equal to 1.25 quarts
Convert to Six Packs
1 forty is equal to 0.555556 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.