How Many Units Are in a Can of Beer?

The number of alcohol units in a can of beer depends on two things: how much liquid is in the can and how strong the beer is. A 330 ml bottle-sized can at 5% ABV contains about 1.65 units. A 500 ml can at the same strength contains 2.5 units. A strong 500 ml can at 7% ABV contains 3.5 units.

The can size alone is not enough to calculate the answer. This guide shows the formula, common beer-can examples, how to compare strengths, and how to record beer without treating every can as one standard drink.

This is the primary page for can-size questions. For pint, lager, ale, stout, or cider served as a pint, see how many units are in a pint of beer; for the 14-unit guideline and weekly context, see the UK alcohol units guide.

How to calculate beer units

Use the UK alcohol-units formula:

Units = volume in millilitres × ABV percentage ÷ 1,000

Use the volume printed on the can and the ABV written as a percentage. For a 440 ml can at 5%:

440 × 5 ÷ 1,000 = 2.2 units

For a 500 ml can at 5%:

500 × 5 ÷ 1,000 = 2.5 units

The calculation is the same for lager, ale, stout, IPA, cider, and other drinks. The result is a measure of pure alcohol, not a measure of taste, colour, calories, or how drunk someone feels.

How many units are in common can sizes?

These examples use a few common can sizes and strengths:

The table is deliberately broad. Many ordinary lagers are near 4% to 5%, while craft and speciality beers may be significantly stronger. A 440 ml can at 8% ABV contains 3.52 units. That is more alcohol than a 500 ml can at 5%.

If you know the exact can volume and strength, use the Alcohol Units Calculator rather than picking the closest table row. The UK alcohol units guide explains how to place the result in a weekly pattern.

Why “one can” is not one unit

People often count cans instead of units because cans are easy to see and remember. That can be a useful first step, but it hides the variables that matter:

• A 330 ml can at 4% = 1.32 units
• A 440 ml can at 5% = 2.2 units
• A 500 ml can at 7% = 3.5 units

Those are all one can, but the strongest example contains more than twice the units of the weakest. If you drink four cans, the totals are about 5.3, 8.8, and 14 units respectively.

Container shape is not a reliable guide either. A tall slim can can hold 440 ml, 500 ml, or a different amount. A multipack may contain smaller cans than the single cans sold at a bar. Check the millilitres.

Pints, bottles, and cans compared

A UK pint is 568 ml, so it is a little larger than a 500 ml can. At 4% ABV, a pint contains about 2.3 units, compared with 2 units in a 500 ml can. At 5% ABV, the pint contains about 2.8 units, compared with 2.5 units in the can.

A 330 ml bottle or can at 5% ABV contains about 1.65 units. Two of those drinks contain about 3.3 units, which is more than one 500 ml can at 5% but less than a strong pint.

The comparison is useful when a session includes different containers. Instead of recording “two cans and a pint,” calculate each one:

• 440 ml can at 5% = 2.2 units
• 330 ml bottle at 5% = 1.65 units
• 568 ml pint at 4% = 2.27 units
• Combined total = 6.12 units

Rounding to one decimal gives about 6.1 units. Keep the exact inputs in your record if you expect to revisit the calculation.

How strength changes the total

ABV is the percentage of alcohol by volume. When the volume stays constant, every one percentage point of ABV changes the result by a predictable amount. In a 500 ml can, each 1% of ABV is 0.5 units:

• 4% = 2 units
• 5% = 2.5 units
• 6% = 3 units
• 8% = 4 units

This is particularly useful for strong beers. A 330 ml can at 8% ABV is 2.64 units, despite being smaller than a 500 ml lager at 5% ABV. A product’s alcohol content should be checked whenever you switch brands, flavours, or styles.

Low- and no-alcohol labels also need a careful read. Different legal and retail definitions can apply, and a product listed as low alcohol may still have a small amount of alcohol. Use the label’s ABV for the calculation and follow any medical or personal reasons you have for avoiding alcohol.

Beer units and weekly tracking

The NHS says that if adults choose to drink, they should not regularly drink more than 14 units per week, spread over three or more days. That guidance is not a personal target and does not make a session safe. It is one context for understanding totals.

Four 440 ml cans at 5% ABV are:

4 × 2.2 = 8.8 units

Six 500 ml cans at 5% are:

6 × 2.5 = 15 units

The second example exceeds the weekly figure before any other drink is added. A strong beer can reach the same total with fewer containers:

Four 500 ml cans at 7% = 4 × 3.5 = 14 units

Tracking the cans, their sizes, and their strengths makes those differences visible. You can also record which days were alcohol-free and whether the drinking was spread out or concentrated in one session. A weekly total without dates loses important context.

Alcohol Tracker° lets you record the can volume and ABV, then keeps the calculated units with the drink entry. That makes it easier to correct an entry when you discover that a “regular” can was actually a stronger product.

Beer calories are a separate estimate

Units and calories are related but not identical. Alcohol itself provides energy, and beer can also contain carbohydrates and other ingredients. A higher-ABV beer usually contains more calories from alcohol per serving, but the exact nutrition varies by product.

If calorie tracking matters, use the label when the manufacturer provides nutrition information. Otherwise, keep the volume and ABV in your record and treat calorie estimates as approximate. Avoid assuming that a lighter colour means fewer calories or that a low-carb label means no alcohol calories.

What beer units cannot tell you

An alcohol-unit calculation describes the amount of pure alcohol in the can. It cannot determine your BAC, your level of impairment, or whether you are safe to drive. Food, body composition, medicines, sleep, drinking speed, and time since drinking all affect how alcohol affects a person.

Never use a beer-unit total or an online calculator as a driving test. If you have been drinking, arrange a sober alternative. If you are worried about how much you drink, or you experience withdrawal symptoms when you stop, speak with a healthcare professional. The NHS advises getting medical advice before suddenly stopping if physical withdrawal symptoms are present.

Frequently Asked Questions

How many units are in a 440 ml can of beer?

It depends on ABV. A 440 ml can at 4% contains about 1.76 units. At 5% it contains 2.2 units, and at 6% it contains 2.64 units.

How many units are in a 500 ml can of beer?

A 500 ml can at 4% ABV contains 2 units. At 5% it contains 2.5 units, and at 7% it contains 3.5 units.

Is a can of beer one standard drink?

Not necessarily. “Standard drink” definitions vary by country, and a can can contain more or less than one standard drink. Use the local definition and the can’s volume and ABV.

Are stronger beers always larger cans?

No. A small 330 ml can at 8% can contain more alcohol than a 500 ml can at 4%. Strength and volume both matter.

How can I calculate the units in my exact beer?

Multiply the can’s volume in millilitres by the ABV percentage and divide by 1,000. The Alcohol Units Calculator can do the arithmetic for you.

The takeaway

A can of beer can contain roughly 1.2 to 4 units or more, depending on size and strength. The reliable calculation is volume in millilitres × ABV ÷ 1,000. A 440 ml can at 5% is about 2.2 units; a 500 ml can at 7% is about 3.5.

Keep the can details with your record, especially when you drink different styles. Counting units instead of containers gives you a clearer picture of what you actually drank.

Put the guide into practice

Keep a clearer drink diary.

Track units, standard drinks, cost, calories, dry days and estimated BAC on iPhone and Apple Watch.