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"ABV" redirects here. For other uses, see ABV (disambiguation).
The ABV declaration on a bottle of absinthe.
Alcohol by volume (abbreviated as abv or ABV) is a standard measure of how much alcohol (ethanol) is contained in an alcoholic beverage (expressed as a percentage of total volume).12 3 The abv standard is used worldwide. 4 In some countries, alcohol by volume is referred to as degrees Gay-Lussac (after the French chemist Joseph Louis Gay-Lussac).5
Typical ABV levels
Proof and ABWAnother way of specifying the amount of alcohol is alcoholic proof, which is twice the alcohol-by-volume number. In the United States, a few states regulate and tax alcoholic beverages according to alcohol by weight (ABW), expressed as a percentage of total mass.8 Some brewers print the ABW (rather than the ABV) on beer containers, particularly on low-point versions of popular domestic beer brands. At relatively low ABV, the alcohol percentage by weight is about 4/5 of the ABV (e.g., 3.2% ABW is equivalent to 4.0% ABV).9 However, because of the miscibility of alcohol and water, the conversion factor is not constant but rather depends upon the concentration of alcohol. 100% ABW, of course, is equivalent to 100% ABV. See alsoReferencesNotes
Bibliography
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