🍷
Blood Alcohol (BAC) Calculator
Estimate your blood alcohol content from drinks, weight and time.
Estimated BAC
0.058%
Impaired — do not drive
Rough estimate using the Widmark formula — never use it to decide whether to drive. Many factors affect real BAC. If you drink, don't drive.
🔒 This tool runs entirely in your browser. Your data is never uploaded.
Frequently asked questions
How is BAC estimated?＋
Using the Widmark formula from your weight, sex, standard drinks and time since your first drink.
Can I use it to decide whether to drive?＋
No — it's only a rough estimate and many factors affect real BAC. If you drink, don't drive.