Answers without an account. No sign-up, nothing kept.
The alcohol unit calculator works out the units in anything from its size and strength. The unit guides give the straight answer for the drinks people actually ask about, worked out from real product strengths rather than a category average.
- Based on UK guidelines
- Private by default
- Free to start
Hello, Daniel
Last 30 days
Today
4.7units
2 logged
This week
54units
40 over guideline
Weekly average
76units
across 5 days
Alcohol-free days
0of 5
Start a streak
Units by day
The dashed line marks 2 units a day, the UK guideline of 14 a week spread evenly.
Why this exists
Most people asking about units are not ready to sign up
Somebody typing how many units are in a bottle of wine wants a number, not a registration form. Putting a wall in front of a one line answer is a way of making sure they go elsewhere. These tools are open, they keep nothing, and they are useful whether or not you ever create an account.
- A number now is more use than an account later
- Category averages are wrong for most real products
- Home measures are roughly double a pub measure and almost nobody adjusts for it
- The sum is simple, but few people know it
How it works
Using free unit tools
Use the calculator for anything
Enter the volume and the strength, or pick a standard measure, and the units come out. Add several drinks to total an evening.
Or read the guide for your drink
Pints, bottles, glasses, singles and doubles, each with a table of sizes and strengths so you can find the one you actually had.
See real brands
Each guide lists real products with their real strengths from the Alcohol-3 catalogue, because a 4% lager and a 5.6% lager are not the same pint.
Keep the number if it is worth keeping
If a one-off calculation turns into wanting a record, an account is free and the logging carries on from there.
What you get
In the app
Alcohol unit calculator
Volume times strength divided by 1000. Add multiple drinks, see the total, and see how it sits against the 14 unit weekly guideline.
Unit guides for real drinks
Pints of beer, lager, cider, stout and Guinness. Bottles and glasses of wine, prosecco and champagne. Singles, doubles and home pours of spirits.
The drink-drive question, answered honestly
There is no number of units that is safe to drive on. The page explains what the limit measures and why units cannot answer it, rather than offering a calculator that implies otherwise.
Nothing recorded
No account, no sign-up and nothing kept from a calculation. Use it and close the tab.
Who this helps
What it changes
If you just want the number
Straight answer, worked out properly, with the sum shown so you can check it. That is the whole job.
If you are checking a week against the guideline
The calculator totals several drinks at once, which is closer to how a week actually looks than working one drink out at a time.
If you are thinking about tracking properly
The calculator is the same maths the app runs on every entry. If it is useful once, it is more useful applied to every drink.
Being straight with you
No amount of alcohol is safe to drive on
Units cannot tell you whether you are over the limit. The limit is measured in alcohol per volume of breath, blood or urine, which depends on your body, what you have eaten and how long ago you drank. Alcohol-3 will not give you a number that implies otherwise. If you have been drinking, do not drive.
Common questions
Do I need an account to use the tools?
No. The calculator and every unit guide are open, with no sign-up and nothing kept from what you enter.
How many units are in a bottle of wine?
A 750ml bottle of 12% wine contains 9 units. At 13.5% it is around 10.1 units. The figure comes from volume multiplied by strength divided by 1000, so the strength on the label matters.
How many units can I drink and still drive?
There is no safe number. The drink-drive limit is measured in alcohol per volume of breath, blood or urine, and how a given drink affects that depends on your body, your food and the time since drinking. The only reliable advice is not to drive after drinking.
Related features
One calculation is useful. Every drink is more so
The tools run on the same maths the app applies to every entry you make. If the number was worth working out once, it is worth keeping.
- No card needed
- Delete your account at any time
- We never sell your data