Use the Widmark formula, choose a drink path, and review legal threshold guidance, metabolism timing, and state BAC standards from a refined high-contrast interface.
Possible impairment
Calculation Status
Below legal limit in many jurisdictions
Hours since first drink
0.00 hours
Estimated Time Until Zero
7:54 AM
Estimated Time Until 0.08%
Now / below limit
Widmark Formula
%BAC = (A × 5.14 / (W × r)) - 0.015 × H
A = fluid ounces of alcohol consumed, W = body weight in pounds, r = gender coefficient (0.73 male, 0.66 female), H = hours since first drink.
This table is for educational UX purposes and should be reviewed against current local law before making any driving decision.
| State | Standard Legal BAC % | Zero Tolerance | Enhanced Penalty |
|---|---|---|---|
| Alabama | 0.08% | 0.02% | Ignition interlock / aggravated |
| Alaska | 0.08% | 0.00% | Commercial / underage |
| Arizona | 0.08% | 0.00% | High BAC penalty tier |
| California | 0.08% | 0.01% | Enhanced DUI penalties |
| Florida | 0.08% | 0.02% | Aggravated BAC enhancements |
| New York | 0.08% | 0.02% | Improved / repeat offender penalties |
| Texas | 0.08% | 0.00% | Enhanced sanctions when BAC is high |
| Washington | 0.08% | 0.02% | Enhanced DUI threshold |
This calculator is an approximation only and is not a medical, legal, or scientific determination of intoxication. Alcohol absorption varies by body composition, food intake, medication, hydration, and individual metabolism. Do not drive or operate machinery after drinking. Always follow local law and seek professional guidance when needed.
The Widmark model estimates blood alcohol concentration based on alcohol consumed, body weight, a distribution ratio tied to sex, and elapsed time since the first drink. It is widely used for high-level estimation and educational dashboards, but the real-world result can differ significantly from the displayed number.
Bac Blood Alcohol Content Calculator Interactive is a free, browser-based health & lifestyle tool that gives you accurate bac blood alcohol content calculator interactive results in seconds — with no account and no data uploaded to any server.
This particular page focuses on a live, interactive conversion surface where every field updates instantly as you type; use it alongside the related tools below to cover adjacent scenarios without switching sites.
Every input you enter is processed locally, so results appear instantly and your figures stay private. Preset examples give you a fast starting point, and the output updates live as you refine your numbers.
Last updated September 2026 · Reviewed by the LoanPay Logic editorial team
Health & Lifestyle