Like any food, wine excess fat. The wine provide calories that add to those made by the rest of ingested food.
As a rule, one gram of alcohol equals 7 calories. If we define as standard glass of wine October 1 cl, equivalent to 7 or 8 glasses per bottle 0.75 l., A glass of wine contains 12.5 to 12.5 degrees or 87.5 grams of alcohol calories.
Therefore, we can generalize that a glass of wine is equivalent to between 80 and 100 calories.
As final data, and for the benefit of responsible consumption of alcoholic beverages, the World Health Organization recommends a daily intake of alcohol no more than 40 or 50 grams daily, which can amount to 4 glasses of wine daily.