Estimate blood alcohol concentration from the number of standard drinks, your weight and sex, and time elapsed using the Widmark formula.
How it works
- Enter your physiological data (weight, sex).
- Enter the number of standard drinks you consumed and hours elapsed.
- The calculator uses the Widmark formula to provide a BAC estimate.
Frequently asked questions
Can I use this to decide if I can drive?
Absolutely not. This is a rough estimate that ignores food, medication, and individual metabolism. Never drink and drive, period.
What is a standard drink?
In the US, about 14 grams of pure alcohol: a 12 oz beer, 5 oz wine, or 1.5 oz spirits.
Why is my real BAC different?
Food, hydration, medications, health, and genetics all shift actual BAC well beyond what any formula predicts.