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What is a unit?

A unit is not the same as a drink. Most alcoholic drinks contain more than one unit. The number of units in a drink is determined by the size of the drink and how strong (i.e. alcoholic) it is.

In many pubs and bars, drinks are being served in larger glasses or amounts, and many drinks are getting stronger. This means that you might be drinking much more than you think. 

Beer

  • A premium pint of lager, bitter or cider (5%) contains 3 units
  • An ordinary strength pint of lager, bitter or cider (3-4%) contains 2 units

Wine

  • A bottle of wine (12.5%) contains 9.5 units (just over 4.5 units each if you share a bottle between two)
  • A large 250ml glass of wine (12.5%) contains 3 units
  • A standard 175ml glass of wine (12.5%) contains 2 units (Many pubs and bars call this a ‘small’ glass)

Spirits

  • A large double measure of spirits (2 x 35ml at 40%) contains 3 units
  • A large single measure of spirits (1 x 35ml at 40%) contains 1.5 units
  • A small double measure of spirits (2 x 25ml at 40%) contains 2 units
  • A small single measure of spirits (1 x 25ml at 40%) contains 1 unit

Alcopops

  • A 275ml bottle of alcopop (5%) contains 1.5 units

To work out the units in your drink and track your drinking, try the NHS drinks tracker, you can download it to your desktop or mobile.

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