How many units is that drink?

A "drink" is not a unit. A pint of strong beer is three UK units; a small glass of wine is under two.

UK units Measured in

Almost exactly a pint of strong beer

3 units is more than 5 of the 9 references on this page.

Reference figures are measurements and are rounded; the unit conversion behind them is exact.

Every reference on this page, with its size and its ratio to your number
Reference	Size	Yours ÷ theirs	Note
single spirit measure	1 units	3×	25 ml at 40%
half pint of lager	1.1 units	2.73×
small glass of wine	1.6 units	1.88×	125 ml at 13%
bottle of beer	1.7 units	1.76×	330 ml at 5%
pint of lager	2.3 units	1.3×	4% ABV
pint of strong beer	3 units	1×	5.2% ABV
large glass of wine	3.3 units	0.909×	250 ml at 13%
bottle of wine	10 units	0.3×
UK weekly guideline	14 units	0.214×

A UK unit is 10 ml of pure alcohol; a US standard drink is 14 g, which is about 1.75 UK units.
The UK guideline of 14 units a week applies to men and women equally and is best spread over three or more days.

Frequently asked

Multiply the volume in millilitres by the ABV percentage and divide by 1 000. A 250 ml glass at 13% is 250 × 13 ÷ 1 000 = 3.25 units.

Ten, for a 750 ml bottle at 13.3%. That is most of a weekly guideline in one bottle.

Guidance figures are UK Chief Medical Officers’ low-risk drinking guidelines and are not medical advice.