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BAC Calculator is a free online blood alcohol content estimator that helps users estimate BAC based on drinks, body weight, and time. It is designed for educational use only and should never be used to decide whether it is safe to drive.
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BAC Calculator is a free online blood alcohol concentration estimator from SafeBAC.org that predicts your BAC from the drinks you consumed, your body weight, and the time since your first drink.
BAC Calculator is a browser-based tool that estimates blood alcohol concentration (BAC) as a percentage. You input sex, body weight in kilograms, country or region, time since your first drink, and each drink's type (beer, wine, spirits, or other), serving size in milliliters, and ABV percentage; it outputs an estimated BAC, a safety overview, and a comparison with commonly cited legal limits for your selected region.
The calculator runs entirely in your browser; the page states that no drink details are stored or sent to servers. It is published by SafeBAC.org, which also offers related tools such as a BAC time-to-zero calculator and a printable BAC chart.
BAC Calculator is for anyone who wants to understand how alcohol intake and body weight affect blood alcohol concentration.
BAC Calculator uses standard BAC estimation formulas based on sex, body weight, total alcohol consumed, and elapsed time since the first drink.
The page emphasizes results are only estimates; actual BAC varies with metabolism, health, medications, and other factors.
Yes, the tool is free online, and the printable BAC chart is also provided at no cost. No payment or subscription is required.
No. The page explicitly warns: "Never use BAC estimates to decide whether you can drive." If you have been drinking, choose a taxi, rideshare, public transport, or a sober driver.
No. All calculations run in your browser, and the site states it does not store or send your drink details to its servers.
Because of differences in body composition and alcohol distribution, women typically have a higher BAC than men after consuming the same amount of alcohol, even at the same body weight.
It is an estimate of how long your body may take to process alcohol and return to 0.00%. Even when that estimate says zero, you may still feel alcohol's effects, so you should not drive.
The calculator is available at https://safebac.org/.
