Calculate the starting alcoholic drink volume and diluent needed to reach a lower target ABV and final volume using conservation of pure alcohol.
Alcohol Units Calculator
Enter your values below to get the result first, then scroll for the full explanation and guidance.
Estimated alcohol units
Estimated alcohol units: 2.95 (2.95 units per serving)
This follows the NHS alcohol-units formula: drink volume in millilitres multiplied by ABV and divided by 1,000.
Units summary
This follows the NHS alcohol-units formula: drink volume in millilitres multiplied by ABV and divided by 1,000.
Result snapshot
A quick visual read of the values behind this result.
Recommended next checks
- →Compare the total with weekly drinking guidance rather than using units as a safety-to-drive decision tool.
- →Double-check the serving size because bottle, can, and glass volumes can vary more than people expect.
- Drink volume
- 568 ml
- ABV
- 5.2%
- Servings counted
- 1
Try different values to compare results.
Enter the labelled serving volume and ABV. The result uses the NHS UK-units formula and can total identical servings. It cannot predict how alcohol affects an individual.
Estimated alcohol units
Estimated alcohol units: 2.95 (2.95 units per serving)
This follows the NHS alcohol-units formula: drink volume in millilitres multiplied by ABV and divided by 1,000.
Units summary
This follows the NHS alcohol-units formula: drink volume in millilitres multiplied by ABV and divided by 1,000.
Result snapshot
A quick visual read of the values behind this result.
Recommended next checks
- →Compare the total with weekly drinking guidance rather than using units as a safety-to-drive decision tool.
- →Double-check the serving size because bottle, can, and glass volumes can vary more than people expect.
- Drink volume
- 568 ml
- ABV
- 5.2%
- Servings counted
- 1
Try different values to compare results.
Table of Contents
Table of Contents
About Alcohol Units Calculator
Alcohol Units Calculator helps you work through the main numbers for this topic quickly with a simple input flow and an instant result.
Use the calculator result as a practical starting point, then review the explanation and assumptions on the page if you want more context.
UK alcohol-unit formula
Multiply drink volume in millilitres by ABV, then divide by 1,000. One 568 ml serving at 5.2% ABV contains 2.9536 units, shown as 2.95. A 0% drink contains zero alcohol units.
NHS low-risk guidance advises no more than 14 units a week on a regular basis, spread over 3 or more days. A unit total is not a driving-safety decision or an estimate of blood alcohol.
Formula explained
Calculation flow
This calculator is structured for fast UK-focused estimates with clear inputs, repeatable logic, and instant results.
Formula
Input values -> calculation engine -> instant result
How the result is built
Example
Example: one 568 ml pint at 5.2% ABV contains 2.95 UK units.
Assumptions
- Units per serving = volume in millilitres x ABV percentage / 1,000; total units multiply this by the whole-number serving count.
- One UK unit is 10 ml or 8 g of pure alcohol; 0% ABV correctly returns zero units.
- This does not calculate calories, blood alcohol, impairment, medical risk or whether it is safe or legal to drive.
Source basis
- UK-focused calculator flow
- Structured input validation
- Instant result breakdowns
Trust and notes
Assumptions and important notes
This calculator is designed to give a fast estimate using the method shown on the page. Results are most useful when your inputs are accurate and the tool matches your situation.
Use the result as guidance rather than a final diagnosis or professional decision. If the result could affect health, legal, financial, or compliance decisions, verify it with a qualified source where appropriate.
- Units per serving = volume in millilitres x ABV percentage / 1,000; total units multiply this by the whole-number serving count.
- One UK unit is 10 ml or 8 g of pure alcohol; 0% ABV correctly returns zero units.
- This does not calculate calories, blood alcohol, impairment, medical risk or whether it is safe or legal to drive.
Method
UK calculator guidance
Last reviewed
April 17, 2026