Brands of chardonnay wine may vary a bit, but in general a 5-ounce pour of chardonnay contains approximately 125 calories. Because chardonnay is a fermented product of grapes, some of the calories do come from carbohydrates, although the majority of calories stem from the alcohol content itself.
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You won’t get any fat or protein from chardonnay, but a 5-ounce glass of the wine does have more than 3 grams of carbohydrates. This equates to at least 12 calories from carbs, since you’ll get 4 calories per gram of carbohydrate. The remaining calories -- about 90 percent of the overall calories -- are from the nearly 16 grams of alcohol. All alcohol provides 7 calories per gram. So about 110 calories in your 5-ounce glass of chardonnay are strictly from alcohol.