Blood Alcohol Content Time-to-Sober Calculator
Using the Widmark formula, estimate your current blood alcohol content and how many hours it will take for your body to metabolize the alcohol down to a target level.
About this calculator
Estimate blood alcohol content using the Widmark formula and how many hours it will take to reach a target BAC as alcohol metabolizes over time.
Frequently Asked Questions
What is the Widmark formula?
The Widmark formula estimates blood alcohol content based on grams of alcohol consumed, body weight, and a sex-based distribution ratio that accounts for differences in body water content.
How fast does the body metabolize alcohol?
On average, the body metabolizes alcohol at about 0.015% BAC per hour, though this varies by individual metabolism, food intake, and other factors.
Is this calculator accurate enough to determine if I can drive?
No. This tool provides a rough estimate only and should never be used to decide whether it's safe or legal to drive. Individual factors vary widely and the only safe choice is not driving after drinking.