BAC Calculator does a metric calculation of your approximate percent blood-alcohol concentration by using your input body weight, the number of drinks you have consumed, a gender-specific metabolism constant, and an elapsed time period. Get an approximate estimation of your level of inebriation BEFORE making that sketchy decision to drive home!

The default unit for body mass is in pounds for the default country(United States); to input weight in kilograms, simply select any other country that defaults to metric units, or switch the toggle metric button to "ON". Your calculated %BAC result will turn red when it has exceeded the legal limit for the selected country and will change to reflect accordingly as soon as another country is selected.

Notice: This application is not for official blood-alcohol content readings and should not be used as a reliable determination of sobriety. You should NEVER operate a vehicle while under the influence of any controlled substances. Legal BAC limits may vary by country for professional drivers, inexperienced/underage drivers, or operators of heavy machinery; Intended for the use of mature audiences; for informational/novelty purposes only.