Estimate your blood alcohol concentration in per mille with the Widmark formula, based on the drink, your weight and the time elapsed.
How to use the Blood Alcohol
Pick a preset drink or enter the volume and alcohol percentage.
Enter your body weight and select your sex.
Set the hours since you started drinking to see the current estimate.
Frequently asked questions
It uses the Widmark formula: grams of pure alcohol divided by body weight times a distribution factor (0.7 for men, 0.6 for women). About 0.15 per mille per hour is subtracted for elimination.
It is a rough estimate. Food, drinking speed, metabolism, medication and individual differences all change the real value, so treat the result as a guide only.
No. Never use a calculator to decide whether you are fit to drive. The only safe amount of alcohol before driving is none.
A blood alcohol calculator that estimates your per mille level from a drink, your weight and sex using the well-known Widmark formula, and shows roughly when you would be sober again.
It is meant for education and curiosity, not as a legal or medical reference, and never as a basis for deciding to drive.
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