Estimate your BAC using the Widmark formula
Estimated BAC
Input your body weight and biological sex. These factors affect how your body processes alcohol — body water content differs between males and females, impacting BAC.
Enter the number of standard drinks consumed and how many hours since your first drink. A standard drink = 12 oz beer (5%), 5 oz wine (12%), or 1.5 oz spirits (40%).
The calculator shows your estimated BAC level with a visual indicator. The legal driving limit in most US states is 0.08%. Remember: this is only an estimate.
This uses the Widmark formula, which provides a reasonable estimate but cannot account for all individual factors. Actual BAC can vary based on food intake, liver function, medications, and metabolism rate.