Calculators

BAC Calculator

Estimate blood alcohol content from drinks, time, weight, and sex. Includes time-to-legal-limit and time-to-zero. Built by Tolyo.

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Profile & Settings

Unit

Weight (kg)

≈ 75.0 kg

Sex

Hours since first drink

Elimination rate (% BAC/hr)

Typical ≈ 0.010–0.020

Legal limit

Empty stomach

Increases effective absorption slightly

Drinks

Custom volume (ml)

Custom ABV (%)

Density 0.789 g/ml used for ethanol

#	Drink	Volume (ml)	ABV (%)	Ethanol (g)
1	Beer (355 ml, 5%)	355	5.0	14.00
Total ethanol				14.00 g

Results

Estimated BAC (now)

0.000%

Before metabolism: 0.027%

Time to legal limit

At or below

Limit selected: 0.08%

Time to 0.00%

0h 0m

Using elimination rate 0.015%/hr

Weight & factor

75.0 kg • r=0.68

Sex affects Widmark r (body water)

Drinks: 1Ethanol: 14.00 gHours: 2.00 h

Important

This is an estimate (Widmark formula). Real BAC varies by many factors. Do not use Tolyo’s calculator to decide whether to drive or operate machinery.
Legal limits differ by country/region; select the one that applies to you.
If in doubt, choose not to drive. Arrange safe transport.