Convert Fluid Ounces of Beer to Forties

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

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Results in Forties:
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1 fl oz = 0.025 forties

Do you want to convert forties to fluid ounces?

How to Convert Fluid Ounces to Forties

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To convert a fluid ounce measurement to a forty measurement, divide the beer volume by the conversion ratio.

Since one forty is equal to 40 fluid ounces, you can use this simple formula to convert:

forties = fluid ounces ÷ 40

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

For example, here's how to convert 5 fluid ounces to forties using the formula above.
5 fl oz = (5 ÷ 40) = 0.125 forties

Fluid ounces and forties 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 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.

Fluid Ounce to Forty Conversion Table

Table showing various Fluid ounce measurements converted to forties.
Fluid Ounces Forties
1 fl oz 0.025
2 fl oz 0.05
3 fl oz 0.075
4 fl oz 0.1
5 fl oz 0.125
6 fl oz 0.15
7 fl oz 0.175
8 fl oz 0.2
9 fl oz 0.225
10 fl oz 0.25
11 fl oz 0.275
12 fl oz 0.3
13 fl oz 0.325
14 fl oz 0.35
15 fl oz 0.375
16 fl oz 0.4
17 fl oz 0.425
18 fl oz 0.45
19 fl oz 0.475
20 fl oz 0.5
21 fl oz 0.525
22 fl oz 0.55
23 fl oz 0.575
24 fl oz 0.6
25 fl oz 0.625
26 fl oz 0.65
27 fl oz 0.675
28 fl oz 0.7
29 fl oz 0.725
30 fl oz 0.75
31 fl oz 0.775
32 fl oz 0.8
33 fl oz 0.825
34 fl oz 0.85
35 fl oz 0.875
36 fl oz 0.9
37 fl oz 0.925
38 fl oz 0.95
39 fl oz 0.975
40 fl oz 1

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