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BAC Calculator - Calculate Your Blood Alcohol Level

Calculate Your Blood Alcohol Level to Avoid a Drunk Driving Arrest.

Blood Alcohol Concentration (BAC) Calculator

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

Note: it's illegal to operate a motor vehicle with a blood alcohol concentration (BAC) of .08 and above in all states.


Number of Drinks



The calculations provided here may not represent your true BAC and should not be relied on as an indicator of whether you are capable of driving. Without belaboring a point made many times before, the best approach is to avoid driving after you drink.

Look at our BAC Chart for estimated levels according to your weight and number of drinks.

DUI Laws by State

Follow the links below to find out what the DUI laws are in your state.

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