How DrinkBuddy works.

An estimate, with a margin

The app works out your BAC from what you enter: what you drank, the glass size, when, and your weight and sex. Nobody can know that exactly. Every body is different and a glass is rarely exactly the size on the label.

So the result is a band, not a single number. For everything to do with driving, DrinkBuddy shows and uses the upper edge of that band. If you clear alcohol faster, you wait a little longer than needed. That is deliberate: better too careful than too late.

Limits per country

DrinkBuddy uses the legal limit of the country you pick, and the lower limit for licences that have one. If a licence type is unknown, the lowest limit of that country applies.

No country found.

Differs per region

In these countries the limit differs per state, province or nation. The table above shows the lowest limit; pick your region in the app for the limit that applies there.

Laws change and depend on the situation. Check the current rules with the authorities of the country where you drive.

An estimate, not a measurement

DrinkBuddy estimates your blood alcohol with a model. It is not a breath test and not driving advice: you stay responsible. In doubt, don't drive.

Read the full disclaimer