Blood Alcohol Concentration (BAC) refers to the percent of alcohol (ethyl alcohol or ethanol) in a person's blood stream and can be measured within 30-70 minutes after drinking. A BAC of .10% means that an individual's blood supply contains one part alcohol for every 1000 parts blood.

AlcoTest app provides a quick way to calculate your Blood Alcohol Concentration as well as time needed to fully sober up (BAC of 0%).