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Interactive calculator

Alcohol Metabolism
Calculator

Your liver clears roughly one standard drink per hour. Enter your drinks, body weight and start time to see an estimated peak BAC — and about when it should be back to zero.

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  • Nothing stored

Your night

Sets the Widmark body-water ratio (0.68 / 0.55).
lbs
drinks
1 US standard drink = 14 g ethanol ≈ 12 oz beer (5%) · 5 oz wine (12%) · 1.5 oz shot (40%).
Used to project the "sober by" clock time.

Estimated peak BAC

— %

Peak BAC (Widmark)—
Below 0.08% (US legal limit) in—
Back to ~0.00% in—
At peak you'd likely feel—

Estimated BAC decline

Assumes an average elimination rate β of 0.015% per hour (real-world range ≈ 0.012–0.020) and that all drinks are absorbed. Drinking over several hours flattens the true peak.

This calculator is for educational purposes only and is not medical advice, diagnosis, or treatment. Results are estimates based on published formulas and population averages — your individual values may differ. Nothing here is calculated on a server: everything runs in your browser and no data is stored or sent anywhere. Always consult a qualified clinician before making health, medication, or training decisions.