A blood alcohol (BAC) calculator estimates your blood alcohol content using the Widmark formula based on drinks, weight, sex and time — always plan for a safe ride home.
A blood alcohol (BAC) calculator estimates your blood alcohol content using the Widmark formula based on drinks, weight, sex and time — always plan for a safe ride home. Our blood alcohol calculator is built on the same core bac calculator blood alcohol content calculator calculate blood alcohol and is trusted by students, professionals and everyday users who need a fast, accurate result. Because every calculation runs locally in your browser, there is no waiting, no sign-up and no limit on how often you use it.
The Widmark BAC Formula
Estimates peak alcohol concentration using total alcohol grams consumed, gender body water constants (r = 0.68 for men, 0.55 for women), and body weight.
Metabolic Elimination Rate
The human liver metabolizes alcohol at an average rate of approximately 0.015% BAC per hour.
Safety Disclaimer
This tool provides educational estimates only. Never drive or operate machinery after consuming alcohol.
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