Blood Alcohol Calculator (BAC)

Estimate your blood alcohol content based on drinks consumed.

Body Weight (lbs)

Standard Drinks

Hours Since First Drink

Disclaimer

This is an estimate only. BAC varies based on metabolism, food intake, medications, and other factors. 1 standard drink = 12 oz beer (5%), 5 oz wine (12%), or 1.5 oz spirits (40%). The legal limit in most U.S. states is 0.08%. Never drink and drive.