Nutrition data and methodology
Nutrition values are based on the Danish Frida Food Data record for raw grapes, which reports 67 kcal per 100 g. Protein, carbohydrate, fat, fiber and common serving weights use USDA raw grape record 174683: 0.72 g protein, 18.1 g carbohydrate, 0.16 g fat and 0.9 g fiber per 100 g, with about 151 g per cup and 49 g for 10 grapes. Calories retain the Frida reference; the USDA record reports 69 kcal per 100 g, reflecting a different reference sample.
Grapes vary in size, variety, water content and ripeness, so serving values are practical estimates rather than exact measurements.