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# Alcohol BAC calculator

Estimates blood alcohol concentration with the Widmark formula from drinks, strength, weight and hours, with a time-to-zero estimate.

Enter your details and drinks for an estimate.

This is the Widmark formula over what you typed, which makes it a population-average estimate, never a test. It cannot see what you ate, your tolerance, medication, or how generously the drinks were poured. It is not a guide for driving: legal limits vary by country and there is no level of alcohol that makes operating a vehicle safe. Nothing you type is sent anywhere or stored.
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## More unit & math tools

- [Unit converter](/converters/units)
- [Average and median](/converters/statistics)
[All unit & math tools](/converters)

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