BMI calculator
Calculate BMI (body mass index) using the WHO formula. Check whether you are underweight, normal, overweight or obese. Free BMI calculator.
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Blood alcohol calculator — BAC (Widmark formula)
This calculator estimates blood alcohol concentration (BAC) using the Widmark formula. Results are approximate — never use as a substitute for a breathalyzer. Never drink and drive.
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How we calculate BAC (Widmark formula)
BAC (‰) = alcohol (g) / (body weight (kg) × r) − 0.15 × hours elapsed. Factor r: men = 0.68, women = 0.55. Time to sobriety = BAC / 0.15.
Example: 80 kg man, 500 ml beer (5%)
80 kg man, 500 ml 5% beer ≈ 19.7 g alcohol: BAC ≈ 0.36‰. Time to sobriety: approx. 2.4 hours.
Frequently asked questions
IMPORTANT: This calculator is for informational and educational purposes only. Results are approximate and do not replace a breathalyzer test. Never drive after drinking.
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