How strong is Champagne and how much alcohol is in a bottle
Champagne usually has 12-12.5% alcohol, roughly the same as white wine. A 100 ml glass is about one standard drink (10 g of pure alcohol), and a whole 0.75 l bottle is more than seven such drinks.
What percentage of alcohol does Champagne have?
Usually 12-12.5% ABV, the same as an average white wine.
Every label gives the strength, in whole or half percentages, for example 12% or 12.5% ABV. Moët & Chandon Brut Impérial (pronounced mo-et ay shon-don broot am-pay-ree-al) is 12.5% according to the SAQ, the alcohol monopoly of the province of Quebec, and the Canard-Duchêne house gives 12.5% as the average for Champagne. European Union rules allow the strength of a sparkling wine to differ from the label by no more than 0.8 percentage points, so a bottle labelled 12.5% may test at anywhere from 11.7 to 13.3%.
For comparison, Poland's National Centre for Counteracting Addictions (KCPU) uses beer at 5%, wine at 12% and vodka at 40% in its materials. So Champagne sits alongside wine, not spirits.
Where does the alcohol in Champagne come from?
From two fermentations: the first in a vat or cask, which turns the must into wine, and the second in the bottle, which adds about 1.5 percentage points of alcohol and the bubbles.
First an ordinary, still base wine is made. The rules of the Champagne appellation require it to have a natural strength, that is without added sugar, of at least 9%. Then sugar and yeast are added to the wine, and it is bottled and sealed. Gérard Liger-Belair, a researcher of Champagne bubbles, says that usually 24-25 g of sugar per litre is added to the bottles, and its fermentation raises the strength by about 1.4-1.5 percentage points, to roughly 12.5%, and produces almost 12 g of carbon dioxide per litre.
The appellation rules also set an upper limit: wine that was enriched with sugar during production must not exceed 13% ABV after the second fermentation. After the hot summer of 2026, the French authorities agreed, as an exception, that growers whose harvest has a very high potential may sell wines from this vintage at up to 15%. According to David Chatillon, co-president of the Comité Champagne, this applies to a small number of growers. Because Champagne must mature for at least 15 months from bottling, and bottling is allowed from 1 January after the harvest, such bottles could reach the shops in spring 2028 at the earliest.
How much alcohol is in a glass and in a bottle?
A 100 ml glass of Champagne at 12.5% contains about 10 g of pure alcohol, that is one standard drink; a 0.75 l bottle about 74 g.
KCPU counts a standard drink as 10 g of pure alcohol, which corresponds to 100 ml of wine at 12%. Champagne at 12.5% gives a similar result. The grams are calculated like this: the volume of the drink multiplied by the strength gives the volume of pure alcohol, and each millilitre of ethanol weighs 0.79 g.
| Amount of Champagne (12.5% ABV) | Pure alcohol | Standard drinks (10 g) |
|---|---|---|
| 100 ml glass | approx. 10 g | approx. 1 |
| 125 ml glass | approx. 12 g | approx. 1.2 |
| 0.2 l bottle | approx. 20 g | approx. 2 |
| 0.375 l half-bottle | approx. 37 g | approx. 3.7 |
| 0.75 l bottle | approx. 74 g | approx. 7.4 |
| 1.5 l magnum | approx. 148 g | approx. 14.8 |
A 0.75 l bottle usually pours six 125 ml glasses, so at a toast each person gets a little over one serving. If there are two of you, smaller formats mean you don't have to open a whole bottle: Moët Impérial in a 0.375 l half-bottle (pronounced mo-ET) is three 125 ml glasses, and 0.2 l version one large glass or two small ones.
Champagne and blood alcohol: how much after one glass?
It depends on body weight, sex, how fast you drink and whether you eat, but two glasses may be enough to exceed the 0.2 per mille threshold.
KCPU gives the Widmark formula: grams of pure alcohol are divided by body weight multiplied by 0.7 for men and 0.6 for women. A man weighing 70 kg who drinks two 100 ml glasses of Champagne at 12.5% (about 20 g of alcohol) may have about 0.4 per mille. A woman weighing 60 kg, after the same amount, about 0.55 per mille. This is a theoretical result that does not take absorption and elimination into account; KCPU says that the body removes on average 0.15 per mille per hour and that nothing speeds up sobering up.
In Poland, the Act on Upbringing in Sobriety treats a concentration of 0.2 to 0.5 per mille as the state after alcohol use, and above 0.5 per mille as intoxication. Why the bubbles in Champagne can make it act faster than still wine is described in the article why Champagne goes to your head.
Champagne, Prosecco, Asti: strength compared
EU rules require the blend from which a quality sparkling wine is made to have a total alcoholic strength of at least 9%. The exception is quality aromatic sparkling wines, made from aromatic grape varieties such as the Muscat in Asti: their actual strength may be as low as 6%. That is why sweet Asti is often noticeably weaker than Champagne; the most reliable way to check the strength of any sparkling wine is the label. We describe the differences between Champagne and other sparkling wines in the article Dorato, Piccolo, Igristoye and Asti.
Drinks sold as “alcohol-free Champagne” are not Champagne, because the appellation applies only to wine. Polish law treats any product with more than 0.5% alcohol as an alcoholic beverage; more in our article on alcohol-free Champagne.
Which bottle to choose
Champagnes differ from one another in style and sweetness rather than strength. If you are looking for your first bottle, start with the ranking of Champagne under 250 zł.
