A standard drink contains .6 ounces of pure ethanol
A standard drink is the quantity of alcohol consumption representing a hypothetical beverage which contains a fixed amount of pure alcohol.
In the United States, one "standard" drink (or one alcoholic drink equivalent) contains roughly 14 grams of pure alcohol, which is found in 12 ounces of regular beer, which is usually about 5% alcohol. 5 ounces of wine, which is typically about 12% alcohol. 1.5 ounces of distilled spirits, which is about 40% alcohol.
Please note, that this figures varies in different countries and regions.