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Get a rough estimate of your blood alcohol content (BAC) with the Widmark formula. This is an estimate only: never use it to decide whether you are fit to drive.
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One standard drink here is 14 grams (0.6 fl oz) of pure alcohol, about a 12 oz beer, a 5 oz glass of wine or 1.5 oz of spirits. The calculation assumes the body clears about 0.015% BAC per hour. Real BAC depends on food, medication, health, drink strength and more, and legal limits differ per country. This page is not medical or legal advice.