Blood Alcohol Content (BAC) Formula

Blood alcohol content (BAC) is defined as the concentration of alcohol in blood. Most of the time it is computed as mass per volume, such as .08% really means .8% or .08 grams of alcohol per 100 grams of blood.

The following is a formula for computing the blood alcohol level:

1 g/kg = 1 g kg-1 = 1 g/L = 100mg/dL = 1 mg/cc = 100 mg% = 1 decigrams% = 0.1 g% = 0.1% = 1%