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
6:01 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.