Alcohol units calculator for drinks, weekly totals, and UK guidance Use this alcohol units calculator to compare pints, glasses of wine, spirits, and mixed drinks against the UK lower-risk guideline. It also answers quick checks such as how many units are in a pint, how many units are in wine, and how much 6 units of alcohol looks like in a practical session.
Mode
Quick examples
Session builder
Add drinks to total the units
Switch between a single session and a weekly view, then enter the drinks you want included. It is also a quick way to answer practical checks such as how much 6 units of alcohol looks like in beer, wine, or spirits.
How the UK units formula works
UK units = volume in mL × ABV% ÷ 1,000. That means a 568 mL pint at 5% ABV contains about 2.8 units, while a 175 mL glass of 12% wine contains about 2.1 units.
Comparison sheet
2.8 units
20% of the 14-unit weekly guideline.
Within guidelines
Weekly guideline share
20%
Sessions like this before 14 units
5
Single-session threshold
3.2 units below
The UK advises not regularly drinking more than 6 units on one occasion.
Share of weekly guideline
20%
11.2 units would remain within the 14-unit week if this were your only drinking session.
Sessions like this before 14 units
5 sessions
Repeating this session much more than once or twice a week can exceed the UK lower-risk weekly guideline.
Common drink equivalents
Translate the current total into the pours most people usually mean when they ask how many units are in a pint, a wine glass, or a spirit measure.
5% pint of beer
1 servings
5% pint of beer is about 2.8 units per serving.
4 more servings would still fit before 14 units for the week.
175 mL glass of 12% wine
1.3 servings
175 mL glass of 12% wine is about 2.1 units per serving.
5.3 more servings would still fit before 14 units for the week.
25 mL shot of 40% spirits
2.8 servings
25 mL shot of 40% spirits is about 1 units per serving.
11.2 more servings would still fit before 14 units for the week.
Session and week planner
Use the average serving in the current plan to estimate how many similar drinks fit into a 6-unit night or a 14-unit week without doing the maths again.
Average serving in this plan
2.8 units
This is the unit cost of the serving you entered.
6-unit session pace
2.1 servings
At this average serving size, you could fit about 1.1 more servings before reaching 6 units.
3-day week budget
1.7 servings/day
Splitting 14 units across 3 drinking days gives about 4.7 units per day.
14-unit week at this pace
5 servings
You still have room for about 4 average servings before reaching 14 units for the week.
How to use the remaining weekly allowance You still have about 11.2 units left before reaching 14 units for the week. Use the equivalents panel and the planner rows to translate that into pints, wine glasses, spirit measures, or average servings instead of guessing.
Guideline note
2.8 units in this session represents 20% of the UK weekly lower-risk guideline (14 units). The UK advises not regularly drinking more than 6 units in a single session.
2.8 units in one sitting uses 20% of the entire 14-unit weekly guideline. Repeating sessions of this size through the week can push total intake up quickly.
UK lower-risk guidelines are defined by the Chief Medical Officers. No level of alcohol consumption is completely risk-free. If you are pregnant, take medicines affected by alcohol, think you may be dependent, or feel unwell when you cut down, seek medical advice rather than relying on a general calculator.
Alcohol units calculator guide: UK units, drink sizes, and weekly limits
If you are searching for an alcohol units calculator, how many units are in a pint, how many units are in a glass of wine, or how much is 6 units of alcohol in practical drink terms, this page gives the conversion and the context in one place.
What this alcohol units calculator is for
This alcohol units calculator turns a real drink list into a UK units total that is easier to compare with the lower-risk weekly guideline. It is especially useful when you want to see how one pint, one glass of wine, or one spirit measure adds up before you decide whether a session is still within the range you had in mind.
It also gives you a simple way to compare a single night out with a weekly pattern. That matters because alcohol risk is not only about the headline total. The way units are spread across the week, and whether you keep several alcohol-free days, changes the practical meaning of the number.
How units are calculated
The formula is straightforward: units = (volume in mL × ABV%) ÷ 1,000. A standard 175 mL glass of 12% wine contains 175 × 12 ÷ 1,000 = 2.1 units. A pint of 5% beer (568 mL) contains 568 × 5 ÷ 1,000 = 2.84 units, often rounded to 2.8. A 25 mL measure of 40% spirits contains 1.0 unit.
Pub measures and bottled drinks increasingly carry unit labelling in the UK, but home servings are often poured larger and can substantially exceed the stated serving size. That is why searches such as units in beer, units in wine, and units in spirits usually need both the conversion and a practical reading of the label.
How many units are in common drinks?
A pint of regular beer, a large glass of wine, and a single spirit measure can all land in very different unit bands even when they look similar in the glass. A pint of 5% beer is about 2.8 units, a 175 mL glass of 12% wine is about 2.1 units, and a 25 mL shot of 40% spirits is 1 unit.
That difference matters when you are comparing drinks for a night out or logging a full week. It also explains why a single drink can easily count as more than one unit, especially for wine and stronger beers.
Weekly units, lower-risk limits, and drink-free days
The UK Chief Medical Officers recommend that adults drink no more than 14 units per week, spread over at least 3 days, with several alcohol-free days. The guidelines apply to both men and women. There is no safe lower limit of alcohol consumption; the guideline is a lower-risk threshold, not a safe threshold.
For single sessions, the CMOs advise not regularly drinking more than 6 units on one occasion. That matters because a week of lighter drinking can still carry a concentrated-binge pattern if most of the units are packed into one or two nights. A planner that shows alcohol-free days and average units per drinking day is usually more useful than a plain weekly total on its own.
What 6 units of alcohol looks like
A 6-unit session can look different depending on the drink. It could be a little more than two pints of 5% beer, about three glasses of 12% wine, or six 25 mL spirit measures at 40% ABV. That is why a calculator is better than a mental shortcut when you are trying to map a guideline onto actual drinks.
The number is also a reminder that drinks with the same glass size do not always have the same impact. A 568 mL pint and a 175 mL glass may look like very different pours, but either one can push you closer to the 6-unit single-session caution point faster than people expect. The quick examples include large wine pours and stronger craft cans because those are common real-world ways a session can cross 6 units even when the drink count looks modest.
How many units are in a bottle of wine and how many pints make 14 units?
A full 750 mL bottle of 12% wine contains about 9 units because 750 × 12 ÷ 1,000 = 9. That means one bottle already uses roughly 64% of the 14-unit weekly guideline. At 13% ABV, the same bottle rises to about 9.8 units, which is why checking the label matters when people assume that one bottle always means the same thing.
Four regular 5% pints come to about 11.4 units, while five pints come to about 14.2 units. So when people search how many pints is 14 units, the practical answer is usually just under five regular-strength pints, but fewer if the beer is stronger or the pour is larger than one pint.
How to use remaining weekly units without guessing
A useful result is not only the session total but what that total leaves for the rest of the week. If tonight's session comes to 6 units, that leaves about 8 units before the 14-unit weekly guideline is reached. In practical terms that is roughly another three 5% pints, almost four 175 mL glasses of 12% wine, or eight single 25 mL spirit measures at 40%.
Thinking in remaining units is often easier than thinking in percentages. It helps with common real-life questions such as whether a weekend plan still leaves room for one pub visit later in the week, or whether a bottle of wine at home has already used most of the weekly allowance.
How to budget a session using your usual serving size
Many people do not repeat a textbook serving size. They repeat their usual pint, their usual large home wine pour, or the same mixed drink all evening. That is why it helps to convert the current plan into an average units-per-serving figure. Once you know that number, you can estimate how many similar servings fit into a 6-unit night or a 14-unit week.
For example, if your current plan averages 2 units per serving, a 6-unit session is roughly three servings and a full 14-unit week is about seven servings. If your current plan averages 3 units per serving, those same limits drop to roughly two servings for a 6-unit session and fewer than five servings for the week. This is a more realistic way to plan than pretending every drink is the same as the label example.
How to use the result in real life
Use the result to compare a drink, a night out, or a whole week against the guideline that matters for the decision you are making. If you want to know whether a plan is likely to stay in the lower-risk range, the useful question is not only how many units you drank but also how those units were spread across the week.
That makes searches such as weekly alcohol units, drink-free days, and how many units can I drink in a week easier to answer honestly. A lower-risk plan is usually about pacing, portion size, and the number of alcohol-free days as much as the headline total.
UK alcohol units are not the same as US standard drinks
A UK unit is 10 mL, or 8 g, of pure ethanol. A US standard drink contains 14 g of pure alcohol, so it is substantially larger than one UK unit. That difference is why international advice on alcohol often looks inconsistent even when the underlying drink volumes are similar.
If you are using UK guidance, stay in the UK-unit system from start to finish. Switching between countries without converting the unit definitions can make a weekly plan look safer or riskier than it really is.
Frequently asked questions
What is a UK alcohol unit?
A UK alcohol unit is 10 mL, or 8 g, of pure ethanol. The unit is a standardised way to compare drinks with different volumes and strengths, which is why one pint of beer can equal several units while a small spirit measure can equal one unit.
How many units are in a pint of beer?
A pint of 5% beer is about 2.8 units. Stronger beers have more, weaker beers have less. The exact figure depends on the ABV and the actual poured volume, so the label matters as much as the drink name.
Is 14 units a safe limit?
No. The 14-unit weekly guideline is a lower-risk threshold for the general adult population, not a safe limit. It is also not meant to override personal medical advice, pregnancy guidance, or concerns about how drinking is affecting sleep, mood, or health.
Do drink-free days matter if I stay under 14 units?
Yes. Staying under 14 units is only part of the picture. Spacing those units across the week and keeping some alcohol-free days is part of the lower-risk guidance because repeated concentrated sessions carry different risks from the same total spread more evenly.
How many units are in 6 units of alcohol?
Six units are already six UK units, so the practical question is what that looks like as drinks. It could be a little more than two pints of 5% beer, around three standard glasses of wine, or six 25 mL spirit measures at 40% ABV, depending on the drink.
How many units are in a bottle of wine?
A 750 mL bottle of 12% wine contains about 9 units. Stronger bottles contain more. For example, a 13% bottle is close to 9.8 units and a 14% bottle is about 10.5 units, which is why a single bottle can use most of the 14-unit weekly guideline.
How many pints is 14 units?
With a regular 5% pint at about 2.8 units, 14 units is roughly five pints. If the beer is stronger, or if you are drinking large cans or craft pours above 5%, the number of pints needed to reach 14 units is lower.
If I drink 6 units tonight, how much is left for the week?
If tonight's session is 6 units, there are about 8 units left before the 14-unit weekly guideline is reached. That is roughly another three regular-strength pints, almost four 175 mL glasses of 12% wine, or eight single spirit measures at 40%, assuming you do not drink anything else.
Do stronger craft beers count as many more units than regular lager?
Usually yes. Units rise with both strength and volume. A 440 mL can at 8% ABV contains about 3.5 units, which is already more than a regular 5% pint at 2.8 units. That difference is why canned craft beer can push a session total up faster than people expect.
Do home wine pours count as more than one glass?
Often they do. Many home pours are closer to 250 mL than 175 mL. At 12% ABV, a 250 mL glass is about 3 units rather than 2.1 units, so a couple of generous home pours can add up to nearly a bottle's worth of units.
How can I work out how many of my usual drinks fit into 6 units?
First calculate the units in your usual serving. Then divide 6 by that figure. If your usual drink is 2 units, around three of those drinks reach 6 units. If it is 3 units, only about two drinks fit into that same session budget. This is why using your own pour size is more useful than relying only on standard examples.
