Alcohol & Drugs

Know Your Blood Alcohol Content


What is BAC?

BAC or Blood Alcohol Content is the concentration of alcohol in a person's blood.  The measurement is generally used as a metric to determine levels of intoxication for legal or medical purposes.  Measurements are generally given as a percentage of mass per volume.  There are many factors that affect a person's BAC, but there are 4 main factors that have a large influence.  These include:

  • A person's gender
  • Rate/Duration of consumption
  • A person's approximate body weight
  • The amount of alcohol consumed (# of Standard Drinks)


BAC Chart

Generally, a person's BAC can be determined by utilizing the above factors and comparing it in a BAC chart.  An example of a BAC chart is shown below:



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