How To Calculate BAC

How to Calculate BAC – Blood Alcohol Content

By Atlanta DUI Attorney Bubba Head

See below how to calculate BAC, or your blood alcohol content level, before you drive. All 50 states have set the minimum BAC legal limit at 0.08% BAC for drivers over 21, and from 0.00% to 0.02% BAC for underage drivers, and 0.04% BAC for CDL drivers (commercial motor vehicle operators).

BAC Calculator -

Every drinking driver in America should spend 15 minutes to LEARN what his or her BAC calculator “value” would be after a couple of standard drinks. This will let that person know whether to take Uber or Lyft, instead of driving.

If you have been arrested for drunken driving because your blood alcohol content level was above the legal BAC limit, you need a top DUI attorney to fight the DUI breath test results. Just because the police evidence includes the results of a DUI breath test that you think are too damaging to win your case, do not plead guilty!

Call a top DUI lawyer in your area right now at 844-832-6384 anytime day or night. Damaging chemical evidence can be excluded from your trial!

The BAC calculator below shows your legal BAC by weight, or your estimated blood alcohol level by the number of standard alcohol drinks consumed in relation to your body weight. It will show you your BAC after one beer.

Here is how to estimate your blood alcohol content using our drunk calculator:

1. Count your number of drinks consumed. One drink = 1 ounce of 100-proof liquor, one 5 ounce glass of table wine, or one 12 ounce bottle of regular beer.

2. Using the chart below, find where “# of Drinks Consumed” and “Body Weight” intersect. This is your estimated BAC.

3. Subtract from this number the percent of alcohol “burned up” during the time elapsed since your first drink. This “burn up” rate is .015% per hour. (Example: 180 lb. man – 8 drinks in 4 hours / .167% minus (.015×4) = .107 %


Weight: (pounds)
Drinks consumed:(12 oz. beer or equivalent)
Over time period: (hours)
Your BAC will be:


# of Drinks Consumed

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A high BAC at the time of your DUI arrest can look hopeless, but we can help! Even one beer can affect your BAC by weight. Our top-rated Atlanta criminal defense attorney and drunk driving book author files pre-trial motions to suppress breath test results, and then fights your DUI charges all the way, by finding and asserting a winnable DUI defense. A lot of drivers are stopped at DUI checkpoints and given a breathalyzer test. If you “blow” over the legal limit, which is 0.08% in all 50 states, the officer will usually ask you to perform field sobriety tests. These tests are VOLUNTARY! Nothing good can come from taking them.

If you are eventually arrested for drunken driving, the police also may order a DUI blood test before you are taken to jail. Therefore, how to calculate BAC is important if you are unsure about your ability to drive safely. attorneys are all in, all the time. Do not plead guilty! Talk to us first. Talk to our best Georgia DUI lawyers now.