A 750-milliliter bottle of chardonnay contains approximately 600 calories. Multiple wine makers state that a 5-ounce serving of chardonnay contains 120 calories. Converting 750 milliliters to ounces yields about 25 ounces of wine; thus, each bottle has about five 5-ounce servings. Five servings times 120 calories equals 600 calories.
Some chardonnays have more calories, such as that of Ernest and Gallo, which has 125 calories per 5-ounce glass. Others have fewer calories, such as Yellow Tail chardonnay from Australia, which boasts 114 calories per 6-ounce glass. A 750 milliliter bottle of Yellow Tail has 20 percent fewer calories than the average brand.