Alcohol Units Calculator

Alcohol Units Explained

An alcohol unit measures pure ethanol in a drink. Different countries define one unit by a different gram amount. This calculator converts drink counts into units using country-specific standards.

Formula

$$\text{pure alcohol (ml)} = \frac{\text{ABV} \times \text{volume (ml)} \times \text{count}}{100}$$

$$\text{units} = \frac{\text{pure alcohol (ml)}}{\text{grams per unit} / 0.789}$$

For the UK, this is equivalent to $$(\text{ABV} \times \text{volume ml} \times \text{count}) / 1000$$ when the unit is 8 grams.

Weekly Limits

UK guidance recommends no more than 14 units per week, spread over several days. Other countries use different limits; check local health advice.