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BAC Calculator (Estimate)

Estimate your Blood Alcohol Content (BAC) based on gender, weight, and consumption.

Weight (kg)

Standard Drinks

Hours Since Drink

In-Depth Guide

Everything you need to know

The Widmark Formula is the standard mathematical approach for estimating blood alcohol concentration. It takes into account body mass and the different rates at which men and women metabolize alcohol.

Standard Drink Definition:

One standard drink is approximately 14 grams of pure alcohol, found in 12oz of beer (5%), 5oz of wine (12%), or 1.5oz of distilled spirits (40%).

DISCLAIMER: This tool provides a mathematical estimate only. Alcohol metabolism varies greatly by individual. NEVER drink and drive. This tool is for educational purposes.