Promil Tracker - Track your drinks, recognize risks early

Add what you drank

Pick a drink type, set the serving size and how long ago you had it, then tap Add This Drink — it won't count until you do.

Select Drink

Beer Amount

Volume (ml)

Alcohol %

Hours Since This Drink

Tell us about you

The same drink produces a different level depending on body weight, gender and how full your stomach was. These three inputs drive the whole calculation.

Gender

Weight (kg)

Stomach Fullness

Stomach fullness affects the promil calculation

Your result will appear below. If you change anything, press Calculate again to see the updated result.

Your result

Your estimated blood alcohol level, when it clears, and how it compares to the legal limits where you are.

02.0‰

0.00‰

Add your drinks, fill in your details, and press Calculate — your result will appear here.

The promil values and time-until-below-the-limit estimates shown here are all approximate. Please don't drink alcohol for your health. Never drive under the influence of alcohol.

Legal Limit (Based on Your Location)

Detecting location...

Calories From Drinks

0 kcal

Want your history and statistics?

The calculator above needs no account — it is open to everyone. Sign in with Google and your drinks are saved, so you can see how they change over time.

Every drink is saved, and your history is there whenever you want it

Daily, weekly, monthly and yearly level and calorie charts

The same log on your phone and your computer

Sample data — sign in to see your own charts

You can keep using every calculation feature without ever creating an account.

What Is Promil Tracker?

Promil Tracker is a free web app that logs the alcoholic drinks you consume and, based on those records, shows your estimated blood alcohol concentration and the calories you have taken in. Its purpose is not to decide how much you should drink, but to show what you actually drank and what it means for your body, in concrete numbers.

The calculations rest on the Widmark formula, used in forensic toxicology for decades. It estimates blood alcohol concentration by dividing the pure alcohol you consumed by your body's alcohol distribution volume, then subtracts what your liver has metabolised over the elapsed time. The variables involved are your weight, sex, stomach fullness, the volume you drank, the drink's alcohol percentage and when you drank it.

The drink database carries real alcohol percentages for widely available brands, so calculations use the strength of what you actually drank rather than a generic "beer" category. In cocktails, each spirit is handled separately — non-alcoholic components like juice and syrup do not inflate the result.

Every value the app shows is an estimate. Metabolic rate, liver function, medications and body composition all shift the outcome, and no formula can be definitive without measuring. That is why you will never find anything resembling "you are fine to drive" anywhere in the app. If you have been drinking, do not drive.

Calculate your blood alcohol level right now