Technology

Alcohol Calculator

Enter your age and weight, log drinks, then see an estimate of your BAC now and as it clears (graph + time-to-zero).

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Inputs & Drink Log

Age (years)

Age isn't directly part of the classic Widmark equation (this calculator uses weight + r + beta).

Weight (kg)

Distribution factor (r)

Custom r (0.45 - 0.80)

Elimination rate (beta, % per hour)

Classic default: 0.015 %/h (varies by person).

Add a Drink

Preset

Time

Volume (mL)

ABV (%)

Drinks

Time	Drink	Ethanol

No drinks logged yet.

Estimated Results

Estimated BAC now 0.000%

Max BAC 0.000%

At —

Estimated time to empty —

BAC projection (graph)

BAC estimate Now Empty

Hourly projection

Important: this is an estimate, not a medical device. Real BAC varies with absorption, food, individual metabolism, drink characteristics, and measurement uncertainty.

Model: Widmark-based approximation with elimination rate beta (classic default 0.015 %/h) and distribution factor r. Reference: Widmark formula.