How Much Alcohol Does 80 Proof Have?
80 proof alcohol, also known as 40% ABV (alcohol by volume), contains 40% pure alcohol and 60% water or other substances. This means that if a drink contains 80 proof alcohol, it has 40% of its volume as pure alcohol. For example, a 1 oz serving of 80 proof whiskey contains approximately 0.4 oz or 12 ml of pure alcohol.