Free Blood Alcohol Content (BAC) & Sober Time Calculator Online
Estimate Blood Alcohol Concentration (BAC) using the clinical Widmark equation based on gender, weight, drink count, and metabolic clearance. — 100% free online utility, zero sign-up, zero paywalls, and private client-side processing.
How It Works
Select Gender & Weight
Input biological sex and body weight in kg or lbs.
Add Drinks Consumed
Input beers (5% ABV), glasses of wine (12% ABV), or shots of liquor (40% ABV).
Enter Drinking Duration
Input hours elapsed since first sip.
Inspect Estimated BAC
Review projected BAC and hours required to reach 0.00% sober level.
Frequently Asked Questions
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