Important note: The drink calculator merely provides a rough estimate of an average person’s BAC and should be used only for entertainment. The calculator should NOT be used to determine if someone is legally able to drive. The results are not reliable, because there are many other factors that this calculator does not take into account, including an individual’s recent food intake, body composition, use of medication, amount of sleep, personal metabolism rate, and other factors. Do not use this drink calculator as a basis for making a decision about drinking and driving. The best decision is not to drink and drive.