Alcohol Units to Grams Converter 2026
Instantly convert UK alcohol units to grams of pure alcohol. Understand your intake, track your consumption, and stay within the NHS low-risk drinking guidelines.
Units to Grams or Grams to Units?
Select your conversion direction below. Enter your value to get an instant, highly accurate conversion based on the official UK definition of an alcohol unit.
Units to Grams Converter
Find the exact weight of pure alcohol in your drinks
Enter the number of UK alcohol units
Choose your preferred rounding precision
Conversion Result
Precise pure alcohol weight and breakdown
Enter a value in units, then click Convert to Grams.
Grams to Units Converter
Find the unit equivalent of a known alcohol weight
Enter the weight of pure alcohol in grams
Choose your preferred rounding precision
Conversion Result
Precise unit equivalent and breakdown
Enter a value in grams, then click Convert to Units.
Common Drinks: Units & Grams
Quick reference table for everyday drinks. Remember, 1 UK unit always equals exactly 8 grams of pure alcohol, regardless of the drink type.
| Drink Type | Volume & ABV | Units | Pure Alcohol (g) |
|---|---|---|---|
| Single small shot of spirits | 25ml at 40% ABV | 1.0 | 8.0 g |
| Standard glass of wine | 175ml at 12% ABV | 2.1 | 16.8 g |
| Large glass of wine | 250ml at 13% ABV | 3.3 | 26.4 g |
| Pint of standard beer/lager | 568ml at 4% ABV | 2.3 | 18.4 g |
| Pint of strong cider | 568ml at 5% ABV | 2.8 | 22.4 g |
| Alcopop / Ready-to-drink | 275ml at 5% ABV | 1.4 | 11.2 g |
| NHS Weekly Low-Risk Limit | Spread over 3+ days | 14.0 | 112.0 g |
Alcohol Conversion Calculator FAQ
Everything you need to know about measuring alcohol units and grams in the UK.
One UK alcohol unit is defined as 10 millilitres (ml) or exactly 8 grams of pure alcohol. This standard measurement is used across the UK to help people track their alcohol consumption accurately.
The NHS advises that both men and women should not regularly drink more than 14 units of alcohol per week. This is equivalent to a maximum of 112 grams of pure alcohol per week, ideally spread evenly over 3 or more days.
You can calculate units using the formula: Strength (ABV %) × Volume (ml) ÷ 1,000. For example, a 250ml glass of wine at 12% ABV contains: 12 × 250 ÷ 1,000 = 3 units (or 24 grams of pure alcohol).
No. A ‘unit’ is a standardized measure of pure alcohol. Whether it comes from beer, wine, or spirits, 1 unit always equals exactly 8 grams of pure alcohol. The difference lies in the volume of liquid required to reach that 8g threshold based on the drink’s ABV.