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Blood Alcohol
Concentration (BAC)

What is BAC?

BAC refers to the percent of alcohol in a person's blood stream. A BAC of .10% means that an individual's blood supply contains one part alcohol for every 1000 parts blood.

In Texas, a person is legally intoxicated if he/she has a BAC of .08% or higher.

Factors that determine BAC

  • Number of standard drinks (see below)
  • Amount of time in which drinks are consumed
  • Body weight
  • Gender
  • Race/Ethnicity
  • Medications
  • Food (to lesser extent)

One standard drink:

  • One 12 oz. regular beer (4.5% alcohol)
  • One 7 oz. malt liquor (7% alcohol)
  • One 4.5 oz. glass of wine (12% alcohol)
  • One-third jigger (.5 oz.) of Everclear (95% alcohol)

More than one standard drink:

  • One 16 oz. cup of beer = 1.4 drinks
  • One 40 oz. beer = 3.6 drinks
  • One 22 oz. malt liquor = 3 drinks
  • One 12 oz. glass of wine = 2.9 drinks
  • One 12 oz. margarita = 2-4 drinks, depending on ingredients
  • One 12 oz. cup of trashcan punch = 4-10 drinks, depending on ingredients

Virtual Bar

This is an interactive program, developed by The Century Council with the University of Illinois, Urbana-Champaign, to educate the user about how alcohol consumption affects an individual's Blood Alcohol Concentration (BAC).
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