UK Alcohol Unit Calculator: Units in a Pint, Glass or Bottle

One UK unit is 10 ml (8 g) of pure alcohol. The NHS formula is: strength (ABV) x volume (ml) / 1,000 = units.

Sources: NHS: calculating alcohol units (read 3 Nov 2026).

Units in common drinks (NHS)

• Single 25 ml shot of spirits (40%): 1 unit
• 125 ml small glass of wine (12%): 1.5 units
• 175 ml standard glass of wine (12%): 2.1 units
• 250 ml large glass of wine (12%): 3 units
• 330 ml bottle of 5% beer or cider: 1.7 units
• 440 ml can of 5.5% beer or cider: 2.4 units
• Pint of 5.2% lager or cider: 3 units

How many units a week?

The NHS advises men and women not to drink more than 14 units a week on a regular basis, spread over three or more days, with several alcohol-free days.

General information only, not medical or legal advice. If you are worried about your drinking, talk to a doctor or see our support pages. Never drink and drive.