Alcohol Conversion Calculator
Enter an amount of pure alcohol in one measure to see it in grams, millilitres, ounces, UK units, standard drinks and calories.
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The alcohol conversion calculator turns one amount of pure alcohol into grams, millilitres, ounces, UK units, standard drinks and calories at once, in your browser. Enter an amount, pick its unit, and it shows grams, millilitres, US fluid ounces, UK units, US, Canadian and Australian standard drinks, and calories.
It helps when a label, recipe or guide uses a different unit from the one you need. Each measure is a fixed conversion of the same alcohol, so you can check whether a figure from one country matches another. The converter counts alcohol only. It does not say that any amount is safe.
How to use the alcohol conversion calculator
The calculator starts at 14 grams, so you will see a result as soon as the page loads. To convert your own amount, follow these steps.
- Type the amount of pure alcohol into the Amount box.
- Open the Measure dropdown and choose the unit your amount is in. The options are Grams of pure alcohol, Millilitres of pure alcohol, US fluid ounces of pure alcohol, UK units, US standard drinks 14 g, Canadian standard drinks 13.45 g, Australian standard drinks 10 g and Calories from the alcohol.
- Read the headline, such as “14 g of pure alcohol = 17.7 ml”.
- Check the line that shows UK units and US standard drinks.
- Look at the table called “The same amount of alcohol in every measure”. The row for your chosen measure is highlighted, and the other seven rows show the same alcohol in the remaining measures.
- To see how much of a drink holds that alcohol, enter the drink’s strength in the Drink strength (% ABV) box. It starts at 5. The note below the table gives the volume. For example, 14 g of alcohol is 355 ml (12.0 US fl oz) of a 5% drink.
The Copy link button sits alongside these controls if you want to share the page with the figures you have entered.
How do I convert grams of alcohol to UK units?
Divide the grams of pure alcohol by 7.89 to get UK units. One UK unit is 10 ml of pure alcohol, which weighs 7.89 g. The NHS rounds a unit to 8 g, so dividing by 8 instead gives slightly lower totals.
- Take the grams of pure alcohol.
- Divide by 7.89.
- Round the result to two decimal places.
For example, 14 g ÷ 7.89 = 1.77 UK units.
How many grams of alcohol are in a UK unit?
A UK unit contains 7.89 grams of pure alcohol. That figure comes from 10 ml multiplied by the density of ethanol, which is 0.789 g per ml. The NHS rounds it to 8 g. The table shows the same unit in other measures.
| Measure | Value for one UK unit |
|---|---|
| Millilitres of pure alcohol | 10 ml |
| Grams of pure alcohol | 7.89 g (NHS rounds to 8 g) |
| US standard drinks | 0.56 |
| Australian standard drinks | 0.79 |
| Calories | 55 kcal |
How many ml of pure alcohol is a standard drink?
A standard drink holds a fixed weight of alcohol, so its volume of pure alcohol depends on the country. To find millilitres, divide the grams by 0.789. A US standard drink holds 14 g, which is 17.7 ml.
| Standard drink | Grams of pure alcohol | Millilitres of pure alcohol |
|---|---|---|
| US | 14 g | 17.7 ml |
| Canadian | 13.45 g | 17.0 ml |
| Australian | 10 g | 12.7 ml |
How many UK units is one US standard drink?
One US standard drink contains 14 g of pure alcohol, which equals 1.77 UK units. Divide 14 by 7.89 to check this. A US drink is also about 1.04 Canadian standard drinks and 1.4 Australian standard drinks.
How many calories are in a gram of alcohol?
Alcohol has 7 kilocalories (kcal) per gram. Multiply the grams of pure alcohol by 7 to get the calories from the alcohol. One US standard drink (14 g) contains 98 kcal, and one UK unit (7.89 g) contains about 55 kcal. These figures cover the alcohol only, not mixers or food.
How do I convert grams of alcohol to units and standard drinks?
Divide the grams of pure alcohol by 7.89 for UK units, by 14 for US standard drinks, by 13.45 for Canadian ones and by 10 for Australian ones. To go the other way, multiply. The table lists what one UK unit and one standard drink of each country equal in the other measures.
| One of these | Grams | ml of pure alcohol | UK units | US standard drinks |
|---|---|---|---|---|
| UK unit | 7.89 | 10 | 1 | 0.56 |
| US standard drink (14 g) | 14 | 17.74 | 1.77 | 1 |
| Canadian standard drink (13.45 g) | 13.45 | 17.05 | 1.7 | 0.96 |
| Australian standard drink (10 g) | 10 | 12.67 | 1.27 | 0.71 |
How this tool works and where the numbers come from
Ethanol weighs 0.789 g per ml. One UK unit is 10 ml of pure alcohol (7.89 g; the NHS rounds to 8 g). A US standard drink is 14 g, a Canadian one 13.45 g and an Australian one 10 g. Alcohol has 7 kcal per gram.
Sources
Frequently asked questions
Does the calculator say how much alcohol is safe?
No. The converter counts alcohol only. It does not say that any amount is safe.
How do I convert a drink instead of a pure amount?
Multiply the drink volume by its strength. For example, 750 ml of 12.5% wine holds 93.75 ml of pure alcohol. That is 74 g, or 9.4 UK units.
What does the Drink strength box change?
It changes the note below the table. The note gives the volume of a drink at the strength you enter that holds the same amount of alcohol.
Why might my UK unit total differ from the NHS figure?
The NHS rounds one unit to 8 g, while this tool uses 7.89 g. The gap is small, but it can add up over several drinks.
Why is a UK unit 7.89 g and not 8 g?
A unit is defined as 10 ml of pure alcohol. Ethanol weighs 0.789 g per ml, so 10 ml is 7.89 g. The NHS rounds this to 8 g in its guidance. The converter keeps 7.89 g so the figures stay exact.
Can I convert a whole drink and not only pure alcohol?
Yes, in two steps. Multiply the drink volume by its strength to get the millilitres of pure alcohol, enter that with the Millilitres of pure alcohol measure and read the other rows. The standard drink calculator on this site does it in one step.
Related tools
- Standard drink calculator: use it when you want to know how many standard drinks an amount of alcohol equals.
- Alcohol unit calculator: use it when your figures are in UK units and you need them in grams or millilitres.
- Drink equivalent calculator: use it when you want to compare two drinks of different sizes and strengths.
- Standard drink size chart: use it when you want a quick reference for how big each country’s standard drink is.
- Alcohol calorie calculator: use it when calories are the measure you care about most.
- How many ounces in a shot: use it when you need to know how a spirit shot translates into fluid ounces.