Blood Alcohol Content (BAC) Estimator

Estimate your BAC using the Widmark formula. For educational purposes only — never drink and drive.

Gender

Body Weight (kg)

Standard Drinks Consumed

Hours Since First Drink

Widmark Formula

BAC = (Alcohol consumed in grams / (Body weight in grams × r)) − (0.015 × hours). The Widmark factor r is 0.68 for males and 0.55 for females. One standard drink contains approximately 14g of pure alcohol.