The UK Chief Medical Officers’ guideline for both men and women is that to keep health risks
from alcohol to a low level it is safest not to drink more than 14 units a week on a regular basis
(best spread evenly over 3 or more days). All of the following are a single unit:

Small regular beer, larger or cider
250 ml, ABV 4%
1 Unit

Small glass of wine
100 ml, ABV 10%
1 Unit

Small measure of spirits
25 ml, ABV 40%
1 Unit

Small glass of sherry
50 ml, ABV 20%
1 Unit

Small serving of aperitifs
42 ml, ABV 24%
1 Unit

Small bottle of lager
330 ml, ABV 4.5%
1.5 Units

Large bitter, lager or cider
500 ml, ABV 5%
2.5 Units

Pint of beer
568 ml, ABV 5.3%
3 units

Large glass of wine
250 ml, ABV 14%

3.5 Units

Large gin & tonic
70 ml Gin, ABV 40%
2.8 Units