BAC Basics

Three pages here cover what a BAC number means and where it comes from. BAC levels sets each reading from 0.02% up to the possibly fatal band above 0.31% beside its typical effects on body and driving, using National Highway Traffic Safety Administration (NHTSA) and MedlinePlus figures. The BAC chart by weight gives estimates for men and women from 100 to 260 lb after 1 to 8 standard drinks, read at 1 hour and at 3 hours. The Widmark formula page walks through the math in pounds and in kilograms and explains every symbol, including r and the hourly drop.

  • BAC Levels and Effects

    BAC levels from 0.02% to past 0.31% explained one number at a time, plus how to turn a hospital result in mg/dL into a percent you can read.

    Updated on

  • BAC Chart by Weight

    Estimated BAC chart by weight for 1 to 8 standard drinks from 100 to 260 lb, read one hour and three hours after drinking, with every constant shown.

    Updated on

  • Widmark Formula for Calculating BAC

    The Widmark formula taken apart one term at a time, with a full BAC example you can check by hand in pounds or kilograms.

    Updated on