How many units are in a pint of stout?
2.4units
That is a pint of 4.2% stout. One UK unit is 10ml of pure alcohol. The weekly guideline of 14 units works out at about 5 of these across a whole week.
Stout and porter usually sit between 4% and 5%, though imperial stouts run far higher. The dark colour says nothing about the strength.

Units by size and strength
| Drink | Size | Strength | Units |
|---|---|---|---|
| Pint of 4.1% stout | 568ml | 4.1% | 2.3 |
| Pint of 4.2% stoutMost common | 568ml | 4.2% | 2.4 |
| Pint of 4.5% porter | 568ml | 4.5% | 2.6 |
| Pint of 5.2% stout | 568ml | 5.2% | 3 |
| Bottle (330ml) of 8% imperial stout | 330ml | 8% | 2.6 |
How this is worked out
units = volume (ml) × ABV (%) ÷ 1000
For a pint of 4.2% stout: 568 × 4.2 ÷ 1000 = 2.4 units.
Try the unit calculatorThe weekly guideline
The UK Chief Medical Officers advise no more than 14units a week for men and women alike, spread over three days or more, with several drink-free days. Drinking a week's worth in one session carries its own risks, separate from the weekly total.
If you drink heavily every day, stopping suddenly can be dangerous. Speak to your GP before cutting down sharply.
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