How many units are in a bottle of champagne? A standard 75cl bottle of champagne at 12% ABV contains 9 UK units, and at 12.5% it contains about 9.4 units. A 125 ml flute contains about 1.5 units. In US terms, a 750 ml bottle at 12% is about 5 standard drinks.
Champagne is usually a little stronger than prosecco, and celebrations make pours hard to track because glasses get topped up. This guide covers every common bottle size, glass size, and sparkling wine style, with the formula to check any label.
How many units are in a bottle of champagne, by size?
In the UK, one unit is 10 ml or 8 grams of pure alcohol. Most champagne is between 12% and 12.5% ABV.
| Bottle | Volume | 12% ABV | 12.5% ABV |
|---|---|---|---|
| Piccolo (quarter bottle) | 20cl (200 ml) | 2.4 | 2.5 |
| Half bottle | 37.5cl (375 ml) | 4.5 | 4.7 |
| Standard bottle | 75cl (750 ml) | 9.0 | 9.4 |
| Magnum | 1.5 L | 18.0 | 18.8 |
| Jeroboam | 3 L | 36.0 | 37.5 |
A single 75cl bottle shared between two people is about 4.5 units each, roughly a third of the UK weekly low-risk guideline per person.
How many units are in a glass of champagne?
Flutes are narrow, so pours look smaller than they are. A standard flute holds about 150 to 200 ml when full, but a typical serving is 100 to 125 ml.
| Serving | 12% ABV | 12.5% ABV | Servings per 75cl |
|---|---|---|---|
| 100 ml (toast pour) | 1.2 | 1.3 | 7.5 |
| 125 ml (standard flute) | 1.5 | 1.6 | 6 |
| 150 ml | 1.8 | 1.9 | 5 |
| 175 ml | 2.1 | 2.2 | 4.3 |
A party where your flute is refilled four times with 125 ml pours adds up to 6 units, even if it feels like "a couple of glasses."
Champagne compared with other sparkling wines
| Sparkling wine | Typical ABV | Units per 75cl | Units per 125 ml |
|---|---|---|---|
| Asti / Moscato d'Asti | 5%–7% | 3.8–5.3 | 0.6–0.9 |
| Prosecco | 11% | 8.3 | 1.4 |
| Cava | 11.5% | 8.6 | 1.4 |
| Crémant | 12% | 9.0 | 1.5 |
| English sparkling wine | 12% | 9.0 | 1.5 |
| Champagne | 12%–12.5% | 9.0–9.4 | 1.5–1.6 |
The difference between prosecco and champagne is about 0.75 to 1.1 units per bottle. If you drink prosecco more often, see prosecco units per glass and bottle.
The champagne units formula
UK units = volume in ml × ABV ÷ 1,000
US standard drinks = ml × ABV (as a decimal) × 0.789 ÷ 14
Example 1: a 75cl bottle at 12.5% (UK units)
750 × 12.5 ÷ 1,000 = 9.375, or about 9.4 units
Example 2: a 125 ml flute at 12% (UK units)
125 × 12 ÷ 1,000 = 1.5 units
Example 3: a 750 ml bottle at 12% (US standard drinks)
750 × 0.12 = 90 ml of alcohol; 90 × 0.789 = 71 grams; 71 ÷ 14 = about 5.1 standard drinks
The alcohol units calculator and the standard drink calculator run these formulas for any bottle or pour. For still wine glass sizes, see how many ml are in a glass of wine.
Does champagne get you drunk faster?
Some research suggests that carbonated drinks can speed up how quickly alcohol is absorbed, which may make the effects of sparkling wine feel quicker than still wine with the same alcohol content. The total amount of alcohol is still set by volume and ABV, so the unit count does not change.
Fast absorption and frequent top-ups make it easy to drink more than you planned. Alternating with water and keeping one glass at a time, rather than letting it be refilled, helps keep count.
Never use a units total or an estimate of how quickly alcohol is absorbed to decide whether you can drive. Plan a lift, taxi, or public transport before a celebration.
How champagne fits into the weekly guideline
The UK Chief Medical Officers advise that it is safest not to drink more than 14 units a week on a regular basis, spread over three or more days.
| Amount of champagne (12%) | Units | Share of 14-unit guideline |
|---|---|---|
| One 125 ml flute | 1.5 | 11% |
| Half a bottle | 4.5 | 32% |
| A 75cl bottle | 9.0 | 64% |
| A magnum shared by two | 9.0 each | 64% each |
If celebrations cluster in one season, a few alcohol-free days around them can help keep the weekly total down. See practical ways to reduce alcohol intake for ideas.
Track every top-up
Alcohol Tracker° lets you log drinks by millilitres and ABV and keeps a running weekly total, so a refilled flute counts as another drink. You can [see Alcohol Tracker° for iPhone and Apple Watch](/) if you want a simpler way to keep count.
Frequently Asked Questions
How many units are in a 75cl bottle of champagne?
A 75cl bottle contains 9 units at 12% ABV and about 9.4 units at 12.5% ABV.
How many units are in a glass of champagne?
A 125 ml flute at 12% contains 1.5 units. A smaller 100 ml toast pour contains about 1.2 units, and a 175 ml glass about 2.1 units.
How many units are in a magnum of champagne?
A 1.5 litre magnum contains 18 units at 12% ABV and about 18.8 units at 12.5%.
Does champagne have more units than prosecco?
Usually, yes. Champagne is typically 12% to 12.5% ABV and prosecco about 11%, so a bottle of champagne has about 9 to 9.4 units compared with about 8.3 for prosecco.
How many standard drinks are in a bottle of champagne?
A 750 ml bottle at 12% ABV is about 5 US standard drinks, and at 12.5% it is about 5.3.
The quick answer
How many units are in a bottle of champagne? A 75cl bottle at 12% contains 9 units and at 12.5% about 9.4. A 125 ml flute is 1.5 units, and a magnum is 18. In US terms, a bottle is about 5 standard drinks.
Sources: NHS alcohol units, UK Chief Medical Officers' low risk drinking guidelines, NIAAA: What is a standard drink?, and CDC: About standard drink sizes.
Keep exploring
Use the calculator or continue with a related guide:
Put the guide into practice
Keep a clearer drink diary.
Track units, standard drinks, cost, calories, dry days and estimated BAC on iPhone and Apple Watch.
