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Blood Alcohol (BAC) Calculator
Estimate your blood alcohol concentration with the Widmark formula from drinks, weight, sex and time.
Tip from Tink: Only time lowers BAC. Coffee and cold showers don't.
Estimated BAC
0.052%
Back to zero in about
3.5 h
A standard drink is 14 g of alcohol: about a 355 ml beer, 150 ml of wine or a 44 ml shot. Nothing you type here leaves your device.
Rough estimate only. Never use it to decide whether you can drive.
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How to use the Blood Alcohol (BAC) Calculator
- Choose sex and units.
- Enter weight, number of standard drinks and hours since your first drink.
- Read the estimate. Never use it to decide whether to drive.
Everything runs in your browser. Nothing you enter is uploaded.