Calories one glass of red wine?

One glass of red wine (5 oz) contains approximately 125 calories. Calories in wine come primarily from alcohol (7 calories per gram) and carbohydrates (4 calories per gram). The amount of calories in a glass of wine can vary depending on the type of wine, alcohol content, and serving size. For example, a glass of sweet wine or fortified wine may have a higher calorie count than a glass of dry wine.