Blood Alcohol Concentration

Features Blood Alcohol Concentration

Blood alcohol concentration (BAC) is a commonly used measure of alcohol intoxication, also known as drunkenness.
It is typically expressed as a percentage of alcohol per volume of blood.
For example, in the United States (US), a BAC of 0.08 (0.08%) would translate to 0.08 grams of alcohol per 100 mL of blood.In the US, the legal limit for BAC when driving is 0.08%.
Drivers who are over the age of 21 (the legal drinking age in the US), who have a BAC equal to or greater than 0.08%, can face penalties.
Penalties for those under the age of 21 are stricter, but vary by state.
For those under the age of 21, the legal limit ranges from 0.01% to 0.05%.