- Subject is a self-reported moderate drinker of alcohol. Moderate drinking can be approximated with a blood alcohol concentration (BAC) of 0.04 - 0.11%. The 0.04% - 0.11% BAC correlates approximately with a 120-160 pound female drinking 2 to 5 drinks in 2 to 3 hours, respectively, and a 160-200 pound male drinking 3 to 7 drinks in 2 to 3 hours, respectively.