# what does proof mean in liquor Twice the alcohol (ethanol) content by volume

• ### What does proof mean in alcohol?

• Answer: Proof is defined as twice the alcohol (ethanol) content by volume. For example, a whisky with 50% alcohol is 100-proof whiskey. Anything 120-proof would contain 60% alcohol, and 80-proof means 40% of the liquid is alcohol. What鈥檚 the History of Proof in Alcohol?

• ### What is the difference between 100 Proof and 200 proof liquor?

• The scale goes from 1 to 200. In the United States, the actual alcohol content, by volume, is half of whatever the proof number reads, so that a 200 proof liquor is 100% alcohol and a 100 proof liquor is 50% alcohol by volume. In other words, the proof is exactly twice the percentage of alcohol that the liquor contains.

• ### How do you find the alcohol percentage from the proof?

• Proof is defined as two times the percentage content of the alcohol per volume. So if you want to find the alcohol percentage of the bottle, all you need to do is divide the proof by two and you will get the alcohol content of the bottle. For instance, if the Proof of a whiskey is 120, the bottle contains 60 percent alcohol.

• ### How do you know if alcohol is high proof?

• There isn鈥檛 a specific number that denotes whether alcohol qualifies as being ‘high-proof,’ but a good standard to go by is whether or not the alcohol is likely to be watered down before bottling. 