Blood Alcohol Calculator

Estimate blood alcohol content (BAC) using the Widmark formula.

1 standard drink = 14g pure alcohol (e.g., 355ml beer, 148ml wine, 44ml spirits)

Fill in your details to estimate your blood alcohol content.

About the Blood Alcohol Calculator

This BAC calculator estimates your blood alcohol level based on drinks consumed, weight, gender, and time elapsed. It uses the Widmark formula.

BAC Levels and Effects

Important Disclaimer

This calculator provides estimates only. The legal BAC limit in most US states is 0.08%. The safest choice is always to not drink and drive. Individual factors like food intake, medications, and health conditions can significantly affect actual BAC.