Understanding your result
How units are calculated
Units = strength (ABV %) × volume (ml) ÷ 1000
So a pint of 5% beer is 5 × 568 ÷ 1000 = 2.8 units. The UK Chief Medical Officers advise not regularly drinking more than 14 units a week, spread over three or more days, with several drink-free days.
⚕️ Guidance for information only. There is no completely "safe" level of drinking. If you're concerned about your drinking, speak to your GP.
Questions
How many units is safe per week?
The UK low-risk guideline is up to 14 units a week for both men and women, spread across the week with drink-free days.
How many units in a bottle of wine?
A 750 ml bottle of 12% wine is about 9 units — most of the weekly guideline in one bottle.
Sources
Evidence-based · last reviewed July 2026