Free tool

Alcohol unit calculator

Add what you drank and see the units worked out for you. No account needed. One UK unit is 10ml of pure alcohol, and the guideline is 14 units a week for both men and women.

Add what you drank

Pick a common drink

Small glass of wine (125ml, 13%)
1
2.3 units

Total

2.3units

That is 16% of the weekly guideline of 14 units.

Calories: 147
Rough cost: £2.76

Calories cover the alcohol itself and any residual sugar. Cost is a rough UK average per unit and will not match your receipt.

Counting one night is a start

A week of honest logging tells you far more than any single evening. Alcohol-3 keeps the running total for you and shows the pattern behind it.

Track this properly, free

How the sum works

Every unit figure in Alcohol-3 comes from the same calculation, applied to the size of the drink and the strength printed on the label.

units = volume (ml) × ABV (%) ÷ 1000

A pint is 568ml. A single measure of spirits is 25ml in Scotland, and 25ml or 35ml in England and Wales. A standard wine bottle is 750ml. Strength varies more than most people expect, so the label is always worth a look.

What the guideline actually says

No more than 14 units a week, for men and women alike.
Spread over three days or more, rather than saved up for one night.
Several drink-free days each week.
There is no level of drinking that carries no risk at all. The guideline is where the risk stays low.

Guidance from the UK Chief Medical Officers, which applies across England, Scotland, Wales and Northern Ireland.

Units in common drinks

Straight answers for the drinks people ask about most.

A calculator answers tonight. A tracker answers the month.

Alcohol-3 keeps the running total, shows the pattern behind it and turns it into something you can take to a GP.

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