How Many Alcohol Units Are in Beer?
Alcohol units are used in the UK to measure the amount of pure alcohol contained in alcoholic drinks. Understanding alcohol units can help you monitor your drinking and make informed choices about alcohol consumption.
The number of units in a beer depends on two key factors:
- Alcohol By Volume (ABV)
- Serving size
A stronger beer contains more alcohol units than a weaker beer of the same size, while larger servings naturally contain more units than smaller servings.
Use our Beer Units Calculator above to quickly calculate the alcohol units in your favourite beer, lager, IPA, stout or ale.
🍺 Beer Units Calculator UK
Calculate how many UK alcohol units are in your beer, lager, IPA or stout.
Total Alcohol Units
What Is an Alcohol Unit?
One UK alcohol unit is equal to:
- 10ml (or 8g) of pure alcohol
Alcohol units provide a simple way to compare different drinks regardless of their size or strength.
For example:
| Drink | Approx Units |
|---|---|
| Half Pint of 4% Lager | 1.1 |
| Pint of 4% Lager | 2.3 |
| Pint of 5% IPA | 2.8 |
| 175ml Glass of 12% Wine | 2.1 |
| Single Measure of Spirits (25ml, 40%) | 1.0 |
How Are Beer Units Calculated?
The formula used to calculate alcohol units is: Units = (ABV × Volume in ml) ÷ 1000
For example:
A pint (568ml) of 5% IPA: (5 × 568) ÷ 1000 = 2.84 units
This means a single pint contains approximately 2.84 UK alcohol units.
Our calculator performs this calculation instantly for any beer strength or serving size.
Units in Popular Beer Styles
Different beer styles contain different amounts of alcohol.
| Beer Style | Typical ABV | Units Per Pint |
|---|---|---|
| Session Ale | 3.5% | 1.99 |
| Lager | 4.0% | 2.27 |
| Pale Ale | 4.5% | 2.56 |
| IPA | 5.0% | 2.84 |
| Strong IPA | 7.0% | 3.98 |
| Imperial Stout | 9.0% | 5.11 |
As a general rule, higher ABV beers contain more alcohol units.
How Many Units Are in Popular UK Beers?
The exact alcohol content can vary, but the following estimates are typical:
| Beer | ABV | Units Per Pint |
|---|---|---|
| Guinness Draught | 4.2% | 2.39 |
| Carling | 4.0% | 2.27 |
| Stella Artois | 4.6% | 2.61 |
| Heineken | 5.0% | 2.84 |
| Peroni Nastro Azzurro | 5.1% | 2.90 |
| Birra Moretti | 4.6% | 2.61 |
| BrewDog Punk IPA | 5.4% | 3.07 |
These values are estimates based on a standard UK pint (568ml).
UK Drinking Guidelines
The UK Chief Medical Officers recommend that men and women should not regularly drink more than:
14 units of alcohol per week
The guideline is intended to reduce health risks associated with alcohol consumption.
The recommendation also suggests spreading drinking over three or more days rather than consuming all units in a single session.
| Beer | Units Per Pint | Pints to Reach 14 Units |
|---|---|---|
| 4% Lager | 2.27 | 6.2 |
| 5% IPA | 2.84 | 4.9 |
| 7% IPA | 3.98 | 3.5 |
| 9% Stout | 5.11 | 2.7 |
Why Do Stronger Beers Contain More Units?
Alcohol units are based on the amount of pure alcohol present in the drink.
A beer with:
- Higher ABV
- Larger serving size
will always contain more alcohol units.
For example:
| Beer | Units |
|---|---|
| 330ml bottle at 4% | 1.32 |
| 500ml bottle at 4% | 2.00 |
| Pint at 4% | 2.27 |
| Pint at 7% | 3.98 |
This is why craft beers, double IPAs and imperial stouts often contain significantly more alcohol units than standard lagers.
Tips for Drinking Responsibly
Understanding alcohol units can help you:
- Track your weekly alcohol intake
- Compare different beer styles
- Make informed drinking choices
- Stay within recommended guidelines
Some practical tips include
Choose Lower ABV Beers
Session beers often contain fewer units per serving.
Alternate With Water
Alternating alcoholic drinks with water can help moderate consumption.
Monitor Serving Sizes
Large bottles, pints and strong beers can quickly increase unit intake.
Use Alcohol-Free Alternatives
Alcohol-free beers contain little or no alcohol and can help reduce overall unit consumption.
Frequently Asked Questions
How many units are in a pint of lager?
A typical pint of 4% lager contains approximately 2.27 UK alcohol units.
How many units are in Guinness?
A pint of Guinness Draught contains approximately 2.39 alcohol units.
How many units are in a 5% IPA?
A pint of 5% IPA contains approximately 2.84 alcohol units.
What is the recommended alcohol limit?
UK guidelines recommend not regularly exceeding 14 alcohol units per week.
How many units are in a bottle of beer?
This depends on the bottle size and ABV. A 500ml bottle of 5% beer contains approximately 2.5 alcohol units.
Do alcohol-free beers contain units?
Most alcohol-free beers contain very few alcohol units, although some may contain trace amounts of alcohol.
How are alcohol units calculated?
Alcohol units are calculated using: (ABV × Volume in ml) ÷ 1000.