Blood alcohol (estimate)

Enter weight, sex, number of drinks and hours elapsed: get an ESTIMATE of your blood alcohol content.

Weight (kg)

Sex

Standard drinks

Hours elapsed

How it works

A «standard drink» contains about 10 g of alcohol (a glass of wine, a small beer, a shot). The Widmark formula estimates blood alcohol from weight and sex, minus elimination over time (~0.15 g/L per hour).

⚠️ Warning

It's only a very rough ESTIMATE: the real value depends on many factors (food, metabolism, health). The legal driving limit in Italy is 0.5 g/L (0 for new drivers). When in doubt, do NOT drive: the only safe value is zero.