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Quick and Easy Way to Estimate Your BAC

When you are drinking you can get a rough estimate of what your BAC currently is. Remember everybody is different and some people can drink more than others and have less of an effect on your BAC. If you are like me, your math skills go down as the amount of drinks you consume goes up.


Step 1:  Count your drinks. 12 ounces of beer, 1 ounce of liquor, and 5 ounces of wine all equal 1 drink.

Step 2:  Use this chart to compare your weight to the number of drinks you have had to find your BAC percent:

DUI Attorney Jesse Block BAC Chart

Step 3:  Subtract 0.15% for each hour since your first drink.

If you were charged and arrest for DUI, contact Block Law (770) 387-4529 for a free consultation today!

An example of how this works.

If you are a 180 pound man and drink  2 beers 1 hour before the UGA football game and want to estimate what your BAC may be you would note your weight: 180, and the number of drinks you consumed: 2 and follow the chart to find your BAC percent: 0.042%. Then you would subtract 0.015% for each hour since your first drink. Right before kick off your BAC estimate is 0.027% after the game, let’s say 4 hours later the estimate would be down to 0.000%

Remember that this is a really rough estimate. It’s probably not a good idea to make decisions about your ability to drive based on this estimate. Alcohol affects everyone differently. This is not legal advice on when you should or should not drive after consuming alcohol. Also, remember that in Georgia you can be charged with a DUI even if your BAC is not over the legal limit of 0.08%. I talk about DUI less safe here.


If you were arrested and charged with DUI in Cobb County, Cherokee County, or Bartow County, you need to speak to an attorney as soon as possible about your case.

Contact Block Law at (770) 387-4529 today for more information on how I can help you or to schedule a free consultation.Georgia DUI Attorney Jesse Block BAC