Beer to Forty Beer Converter
Convert Standard 12 oz Beers to 40 oz Bottles
0.3 forties
40 oz bottles
Understanding Beer Size Conversion
Standard Beer Size
A standard beer in the United States contains 12 fluid ounces (fl. oz.) of beer, typically served in bottles or cans. This is the most common serving size you'll find in bars, restaurants, and retail stores.
What is a Forty?
A "forty" refers to a 40-ounce bottle of beer, which contains the equivalent of approximately 3.33 standard beers. These larger format bottles were popularized in the United States during the 1980s and remain available in many locations today.
Conversion Formula
To convert from standard beers to forties, multiply the number of beers by 0.3. This conversion factor comes from dividing the standard beer volume (12 oz) by the forty volume (40 oz).