What is one UK alcohol unit?

One UK alcohol unit equals 10 ml (8 g) of pure alcohol. The formula is: units = volume (ml) × ABV% ÷ 1000. For example, a 250 ml glass of 13% wine contains 250 × 13 ÷ 1000 = 3.25 units.

How many units per week is safe?

The NHS advises drinking no more than 14 units a week for both men and women. This should be spread evenly over three or more days, not consumed in one or two sessions.

How many units are in a pint of beer?

A standard pint (568 ml) of 4% ABV beer contains 568 × 4 ÷ 1000 = 2.3 units. Stronger craft beers at 5–6% ABV can contain 2.8–3.4 units per pint.

How many units are in a glass of wine?

A large 250 ml glass of 13% wine contains 3.25 units. A standard 175 ml pub measure at 13% contains 2.3 units. A small 125 ml glass at 12% contains 1.5 units.

How many units are in a single spirit measure?

A standard UK pub single measure (25 ml) of 40% ABV spirit contains exactly 1 unit. A double (50 ml) contains 2 units.

Does this calculator store my data?

No. All calculations happen in your browser. Nothing is sent to any server. Your drink log is only held in memory for the current session and is cleared when you close or refresh the page.

Alcohol Units Calculator

Name: Alcohol Units Calculator
Availability: InStock
Author: Nham Vu

Enter the volume (ml) and ABV% of a drink to instantly see how many UK alcohol units it contains.

Drink Details

Quick Presets

Volume (ml)

ABV (%)

Drink name (optional)

Result

Enter volume and ABV above, then click Calculate.

Session Log

No drinks logged yet. Use the "+ Add to Log" button to track multiple drinks.

Summary

Enter the volume (ml) and ABV% of a drink to instantly see how many UK alcohol units it contains.

How it works

Enter the volume of your drink in millilitres (ml).
Enter the ABV (alcohol by volume) percentage shown on the label.
The calculator applies the formula: units = volume_ml × ABV% ÷ 1000.
Your result shows the units in that drink and how it compares to the NHS weekly limit.
Add multiple drinks to track your running total for the day or week.

Use cases

Check how many units are in a glass of wine, pint of beer, or spirit measure.
Track your weekly alcohol intake against the NHS 14-unit guideline.
Compare the unit content of different drinks before choosing.
Calculate units for homebrew or craft drinks where ABV is known.
Help someone understand what "one unit" of alcohol actually looks like.
Plan a night out and estimate total consumption in advance.

Frequently Asked Questions

Last updated: 2026-06-09 · Reviewed by Nham Vu