Enjoy two cups of grapes as a filling and satisfying snack. Why not raisins? Raisins have more calories than grapes. One cup raisins = 250 calories while 1 cup grapes = 60 calories. Also, fresh fruit is always a better choice with all its nutrients and fiber. But yes, please do indulge by sprinkling a few raisins on your salads or in your baking.