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What percentage of alcohol does wine have?
The alcohol content of the wine is expressed in Percent by volume (vol.-%). This unit of measurement denotes the volume fraction of a substance in the total volume content of a mixture - in the case of wine, the volume content of the alcohol measured in the total volume content of the wine. This calculation is necessary because alcohol has a lower density than e.g. water, of which wine consists of about 80 percent.
Wine has a legal minimum alcohol content of 7 to 8 percent by volume depending on the growing region (depending on the wine-growing zone in which it is located). The maximum alcohol content depends on the ripeness of the grapes and indirectly on the grape variety and origin and can theoretically be over 16 percent by volume.
Most dry wines have an alcohol content of between 12 and 14 percent by volume; in the case of residually sweet wines, it can also be less than 10 percent by volume. Dry red wines often have a higher alcohol content (on average 12-14.5 percent by volume) than white wines (on average 11.5-14 percent by volume).
By the way, the article: How many calories does wine have? explains how the alcohol content can be converted from percent by volume to grams of pure alcohol