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(989) 964-2292

Director of Student Wellness Programs

Sara Martinez


D 105


Summer office hours: Mondays, Wednesdays, Fridays from 10am to 4:30pm.
We are available on the days were are closed but you will need to schedule an appointment.
If our office is closed but you need any of our resources, please contact Sara Martinez at 989-964-2292 to schedule an appointment or feel free to contact her at

Blood Alcohol Concentration (BAC)

The amount of alcohol in a person’s body is measured by the weight of the alcohol in a certain volume of blood. This is called the blood alcohol concentration or BAC. BAC measurements provide an objective way to identify levels of impairment, because alcohol concentration in the body is directly related to impairment.

Each standard drink raises a person's BAC but to what degree depends on several factors. When you hear the word BAC think numbers not how someone should feel. BAC is determined in the form of numbers. For example, a BAC of a .08 is the drunk driving standard in Michigan. This means that a person can be issued a drunk driving ticket with this amount or higher. If someone is below a BAC of a .08, he/she can still be issued a ticket if the police officer determines that the person is unsafe to drive.

What effects BAC?

There are several factors that can effect your BAC.

  • Gender
  • Weight
  • Type of alcohol
  • How fast you drank
  • Food (slows down absorption in the stomach, does not absorb the alcohol)

What is my BAC?

Want to find out how to gauge your BAC? We have a few helpful links. All links are estimates and used for educational purposes only.

Blood Alcohol Calculators

Male (529kB) Female (953kB) Online 


How should I feel?

There are a few factors that influence how one feels when they consume alcohol. This is why it is not good to gauge how "drunk" you are based on how you feel. Factors include, but are not limited to...

  • Mood
  • Use of medication or other drugs
  • Food
  • Temperature
  • Atmosphere of gathering
  • Tolerance

For more information and a handout about BAC and the effects, please click here.

Below is a link that looks at BAC and how it effects someone will little or no tolerance. For people who have a tolerance, it is difficult to achieve a buzz and they usually go from sober feeling to drunk feeling with little in between. If you do believe that you have built up a tolerance and would like to lower it, please see our low-risk tips section.


*This information is for educational purposes only! Remember that if you are in the State of Michigan then it is illegal to drink under the age of 21.

*If you are gathering this information for a group presentation, please contact PHE. We offer FREE programs, please go to our RA and RSO program request page. We try to make it as easy as possible on the group requesting and all PHEs are trained in the above subject matter.

*If you need any additional information, please email or call 989.964.4658.