(Volume ingested in mL x the "proof" of the beverage x 1.463) / (Individual's weight in pounds)

This estimate applies only to a single dose of alcohol (ethanol).

This tool calculates the approximate blood alcohol (ethanol, ethyl alcohol) concentration resulting from one drink. The "proof" will be listed on the container of the beverage. The proof is 2 times the alcohol percentage. In other words, 120 proof = 60% alcohol.

The units on the calculated estimate are mg/dL or milligram (mg) %. The legal limit (varies state to state) for driving is 80-100 mg/dL. One ounce = 30 mL.

Rosen et al, eds. Emergency Medicine: Concepts and Clinical Practice. 3rd ed. St. Louis, MO: Mosby; 1992:2521.