Alcohol Units & BAC Calculator

Units per drink, weekly total and a rough BAC estimate.

Result

Units per drink2.3
Weekly units18.4
vs 14-unit guideline4.4 units OVER
BAC per drink (rough)0.036%

Alcohol Units & BAC Calculator — FAQs

What is a UK unit of alcohol?

10 ml (8 g) of pure alcohol. A pint of 4% beer ≈ 2.3 units; a large glass of wine ≈ 3.3. Units = ml × ABV ÷ 1000.

What's the UK drinking guideline?

14 units per week maximum, spread over 3+ days — for both men and women.

UK weekly alcohol limit?

14 units/week for men and women, ideally spread over 3+ days. A 175ml glass of 13% wine is ~2.3 units.

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