BAC Calculator - Estimate Blood Alcohol Levels for the Amount and Type of Drinks for Your Sex and Weight.

Please complete the following items, then press calculate to obtain the BAC estimate.

Select Gender

| or |
Number of ...

12 oz beers

5 oz glasses of wine 

1.5 oz measures of spirits

- Over how many hours

- Your weight in pounds


Estimated BAC

Dressed up mid-aged people drinking a dark liquid in wine glasses

*All states have implemented .08 BAC per se laws.

Important Estimated BAC Readings Information

These BAC estimates are provided for educational purposes only. Please do not drink and drive. In no way should you use these BAC estimates be used as a basis to make a decision about whether you should drink and drive.

Blood alcohol content or blood alcohol concentration (abbreviated BAC) is the concentration of alcohol in a person's blood. BAC is most commonly used as a metric of intoxication for legal or medical purposes. A BAC reading of 0.08% is legally drunk driving in the Unitied States. Unless a person has developed a very high tolerance for alcohol, a BAC rating of 0.20% represents very serious intoxication. In general most first-time drinkers are unconscious by about 0.15%. A range of 0.35% to 0.40% usually represents potentially fatal alcohol poisoning. 0.40% is the accepted lethal dose for about 50% of adult humans. However, in rare cases a very heavy long time drinker may be able to more than double that number.

The alcohol is removed from your bloodstream by a combination of metabolism, excretion, and evaporation. The proportion of alcohol removal varies from person to person, but typically about 92 to 98% is metabolised, 1 to 3% is excreted in urine, and 1 to 5% evaporates through the breath. Only a very small proportion less than 1 percent is excreted in the sweat. The alcohol excretion in urine typically begins after about 40 minutes. Your metabolisation commences as soon as the alcohol is absorbed, and even before alcohol levels have risen in the brain.

Note: BAC and Alcohol burnoff levels are different in everyone for a variety of reasons such as:

  • Amount and type of food in the stomach.
  • Amount and types of drugs or prescriptions in your body.
  • Your liver function.
  • Percentage of body mass index and body fat.
  • Age and past drinking experience.
  • Gender and race also play a role.

Again, do not use this information as a guide to operate a motor vehicle, to operate machinery, or any other purpose. Please do not contact us for technical support on this, because there is no warranty on the results.
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