How Many Calories in a Glass of White Wine?

That actually depnds on the size of your wine glass! The actual serving size for white wine is about 4 or 5 ounces. Most wine glasses, however, tend to serve 10 ounces! White wine tends to be about 100 calories in a 5 ounce serving, but if you’re toasting with that 10 ounce wine glass then you’re taking in double calories at 200 calories a glass!