Blood Alcohol Calculator

Blood Alcohol Calculator

DON'T DRINK AND DRIVE! See how little alcohol is required to change the alcohol content of your blood stream.

Imperial Metric
Enter your gender:
Enter your weight:
Select your beverage:
Enter the number of those consumed:
Enter the amount of time since drinking began:
Calculating Result...
Enter your gender:
Enter your weight:
Select your beverage:
Enter the number of those consumed:
Enter the amount of time since drinking began:
Calculating Result...

The BAC Calculator

This BAC calculator can only estimate your blood alcohol levels. Metabolism, body fat percentage and medication are other factors that can affect the rate of absorbtion by the body, and these are not considered in this calculation.

Blood alcohol content (BAC) or blood alcohol level is the concentration of alcohol in the bloodstream. It is usually measured as mass per volume. For example, a Blood alcohol content BAC of 0.04% means 0.4% (permille) or 0.04 grams of alcohol per 100 grams of individual’s blood. Use the HealthStatus BAC Calculator for informational purposes only, and not to drink and drive or drink and work.

Every state in the U.S. has a legal Blood Alchohol (BAC) limit of 0.08% per se. Most states also have lower legal BAC limits for young and inexperienced drivers, professional drivers and commercial drivers. Sentences for drunk driving include imprisonment, large fines, lengthy drivers license suspension and/or revocation, house arrest, community service, DUI schools, alcohol treatment programs, vehicle forfeiture and ignition interlock restrictions.

Important Note: There is no bac calc that is 100% accurate because of the number of factors that come into play regarding the consumption and reduction (burnoff) rates of different people. Factors include the gender (male/female) of the drinker, differing metabolism rates, various health issues and the combination of medications that might be taken, drinking frequency, amount of food in the stomach and small intestine and when it was eaten, elapsed time, and others. The best that can be done is a rough estimation with the bloodstreams alcohol content or the BAC level based on known inputs.

Impaired driving as a problem:

  • In 2016, 10,497 people died in alcohol-impaired driving crashes, accounting for 28% of all traffic-related deaths in the United States.
  • Of the 1,233 traffic deaths among children ages 0 to 14 years in 2016, 214 (17%) involved an alcohol-impaired driver.
  • In 2016, more than 1 million drivers were arrested for driving under the influence of alcohol or narcotics. That’s one percent of the 111 million self-reported episodes of alcohol-impaired driving among U.S. adults each year (figure below).
  • Drugs other than alcohol (legal and illegal) are involved in about 16% of motor vehicle crashes.
  • Marijuana use is increasing and 13% of nighttime, weekend drivers have marijuana in their system.
  • Marijuana users were about 25% more likely to be involved in a crash than drivers with no evidence of marijuana use, however other factors–such as age and gender–may account for the increased crash risk among marijuana users.

Calculator Source: Computing a BAC Estimate. Driving under the Influence October 1992. U.S. Department of Transportation

Drinking alcohol increases your risk for liver problems. If you think you or someone you know might have a problem with alcohol, take the alcohol abuse quiz.

References
National Highway Traffic Safety Administration. Traffic Safety Facts 2016 data: alcohol-impaired driving. U.S. Department of Transportation, Washington, DC; 2017 Available at: https://crashstats.nhtsa.dot.gov/Api/Public/ViewPublication/812450External
Blincoe LJ, Miller TR, Zaloshnja E, Lawrence BA. National Highway Traffic Safety Administration. The economic and societal impact of motor vehicle crashes, 2010. (Revised). U.S. Department of Transportation, Washington, DC; 2015. Available at: http://www-nrd.nhtsa.dot.gov/pubs/812013.pdfCdc-pdfExternal.
Federal Bureau of Investigation (FBI). Department of Justice (US). Crime in the United States 2016: Uniform Crime Reports. Washington (DC): FBI; 2017. Available at https://ucr.fbi.gov/crime-in-the-u.s/2016/crime-in-the-u.s.-2016/tables/table-18External.
Compton RP, Berning A. National Highway Traffic Safety Administration. Traffic Safety Facts Research Note: drugs and alcohol crash risk. U.S. Department of Transportation, Washington, DC; 2015 Available at: http://www.nhtsa.gov/staticfiles/nti/pdf/812117-Drug_and_Alcohol_Crash_Risk.pdfCdc-pdfExternal.
Berning A, Compton R, Wochinger K. National Highway Traffic Safety Administration. Results of the 2013–2014 national roadside survey of alcohol and drug use by drivers. U.S. Department of Transportation. Washington, DC; 2015. Available at: https://www.nhtsa.gov/sites/nhtsa.dot.gov/files/812118-roadside_survey_2014.pdfCdc-pdfExternal.

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5 Comments

  1. Keith Breedlove Reply

    I’d like to be able to calculate my expected BAC after this scenario: a lite beer at 5:00 while grilling, 2 glasses of wine with dinner until 7:30, another glass of wine while watching tv, finishing with a shot of scotch at 9. Perhaps averaging the ABV would work?

  2. Matthew Greer Reply

    Alcohol is metabolized (broken down) by the body at a rate of 0.016% per hour. You’re having 5 drinks over the course of 4 hours. Without knowing your weight, I can’t give you an exact figure. If you are at or over 200 lbs you should be below .08 pretty much the whole time. By 10 or 11 your BAC would be very very low.

  3. Some Dude Reply

    This calculator indicates no difference between light beer and regular beer. It does not list “alcohol by volume”.

    Per this calculator, two 12 ounce beers in 1 hour consumed by a 167 lb man yields a BAC of 0.03. My own calculations, using 5% abv, show 0.04, so this calculator seems a little low to me.

    Budwiser is 5% abv. Coors Light and Miller Light are both 4.2%. Many craft beers are in the 6-7% range.

    Coors

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