A standard drink is defined as 12 ounces of beer, 5 ounces of wine, or 1.5 ounces of distilled spirits, which contain the same amount of alcohol.

A standard drink is defined as 12 ounces of beer, 5 ounces of wine, or 1.5 ounces of distilled spirits, which contain the same amount of alcohol.

(National Highway Traffic Safety Administration. “Alcohol Screening and Brief Intervention in the Medical Setting.” DOT HS 809 467. Washington, DC: National Highway Traffic Safety Administration, July 2002.)