Close-up view of a blackberry Nutritional value per 100 g (3.5 oz) Energy 180 kJ (43 kcal) Carbohydrates 9.61 g Sugars 4.88 g Dietary fiber 5.3 g Fat 0.49 g Protein 1.39 g Vitamins Quantity %DV† Vitamin A 214 IU Thiamine (B1) 2% 0.020 mg Riboflavin (B2) 2% 0.026 mg Niacin (B3) 4% 0.646 mg Vitamin B6 2% 0.030 mg Folate (B9) 6% 25 μg Vitamin C 25% 21.0 mg Vitamin E 8% 1.17 mg Vitamin K 19% 19.8 μg Minerals Quantity %DV† Calcium 3% 29 mg Iron 5% 0.62 mg Magnesium 6% 20 mg Phosphorus 3% 22 mg Potassium 3% 162 mg Sodium 0% 1 mg Zinc 6% 0.53 mg Link to USDA Database entry Units μg = micrograms • mg = milligrams IU = International units †Percentages are roughly approximated using US recommendations for adults. Source: USDA Nutrient Database