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Alcohol calculator
Find out when you can drive again after drinking.
How to use the calculator
Enter accurate data to get an approximate remaining alcohol estimate.
Input data
Enter gender, weight and the amount of alcohol.Time
Include the time since your last drink for a more realistic result.Safety
The result is indicative. Zero tolerance applies for driving in CZ.Frequently asked questions
Is the result legally binding?
No, it is an indicative estimate. Official measurement or medical tests are decisive.
When can I safely drive?
In the Czech Republic there is zero tolerance. Always wait longer than the estimate.
Why do results differ?
Alcohol metabolism is individual and affected by multiple factors.
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How does our alcohol calculator work?
Our calculator uses the Widmark formula to estimate blood alcohol level. It accounts for your weight, gender and the type of alcohol consumed. The result is indicative but gives a solid estimate of how long alcohol elimination will take.
Remember that each body processes alcohol at a different rate.