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Alcohol proof is a measure of the content of ethanol (alcohol) in an alcoholic beverage. The term was originally used in the United Kingdom and was equal to about 1.75 times the alcohol by volume (ABV). The UK now uses the ABV standard instead of alcohol proof. In the United States, alcohol proof is defined as twice the percentage of ABV.
Various sources of sugar are used in these processes, resulting in different forms of alcohol. The sugar from crushed grapes is used to make wine; malted barley is used to make beer; sugar cane or molasses makes rum; grain, potatoes, beets, molasses, and a variety of other plants are used to make vodka.The technique used to make the beverage will determine the alcohol content.You will see the percentage of alcohol per volume listed on the bottle, as well as the proof of the drink. The proof of a beverage is twice the alcohol content, so a drink with 12% alcohol per volume is 24 proof.Generally, a 12-ounce glass of beer, a 5-ounce glass of wine, and a 1.5-ounce shot of liquor all contain a Â½ ounce of pure alcohol and are considered one drink. Continue Reading.he proof of a beverage is twice the alcohol content, so a drink with 12% alcohol per volume is 24 proof. Generally, a 12-ounce glass of beer, a 5-ounce glass of wine, and a 1.5-ounce shot of liquor all contain a Â½ ounce of pure alcohol and are considered one drink. Continue Reading.