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
External links
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