Alcohol Units Calculator
Find out what is really in your glass. Enter the drink's size and ABV strength to get its UK alcohol units, grams of pure alcohol and the matching number of US standard drinks — useful for tracking intake honestly.
How to use
- Enter the drink volume in millilitres.
- Enter the ABV percentage from the label.
- Enter the number of drinks and read the totals.
Note
UK units = volume (ml) x ABV (%) / 1000. Pure alcohol grams = volume x ABV / 100 x 0.789. One US standard drink contains 14 g of pure alcohol. Estimate only — not medical advice.
Frequently Asked Questions (FAQ)
How are UK alcohol units calculated?
UK units equal the drink volume in millilitres multiplied by the ABV percentage, divided by 1000.
What else does the tool show?
It also shows the grams of pure alcohol and the number of US standard drinks, where one US standard drink contains 14 grams of pure alcohol.
Can I total several drinks?
Yes. Enter the number of drinks and the tool totals the UK units and grams of pure alcohol.
Can I use this to decide if I can drive?
No. This is only an estimate of what is in the glass, not a measure of impairment. Never drive after drinking.