What's your blood alcohol content???  Find out below!

BAC Calculator

Select your weight:

Number of drinks:

Hours since first drink:


BAC Calculator Explained

  • Weight: Select your weight. If you are between weights listed, round down to be conservative.
  • Drinks: Select the number of "standard drinks" you consumed or expect to consume. (standard drinks means a 12oz. can of beer with 4.5% alcohol content)
  • Hours: Select the number of hours drinking. Time means from the first sip to the last. (round down to be conservative)
  • Gender: This is the easy question.
  • Calc BAC: Click this button to calculate your estimated BAC.
BAC is a very complicated calculation full of variable assumptions. This calculator is meant as a guide to help you understand how the number of drinks you consume translates into BAC. To better understand the assumptions behind the BAC formula, visit our BAC page.

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