There are 137 calories in a 1/4 cup of unpacked Brown Sugar. : Calorie breakdown: 0% fat, 100% carbs, 0% protein. There are 207 calories in a 1/4 cup of packed Brown Sugar. There are 207 calories in a 1/4 cup of packed Brown Sugar. For every 100 grams of natural brown sugar contains 100 mg potassium; 85 mg calcium; 23 mg magnesium; 3.9 mg phosphorus; and 1.3 mg iron. Brown sugar 1 cup unpacked 551 calories 142.2 grams carbs 0 grams fat 0.2 grams protein 0 grams fiber 0 mg cholesterol 0 grams saturated fat 40.6 mg sodium 140.7 grams sugar 0 grams trans fat grams cup packed cup unpacked tsp brownulated tsp packed tsp unpacked tbsp Nutrition Facts. In a 1/4 cup brown sugar ( (1/4 Cup Serving) ) there are about 137 calories out of which 0 calories come from fat. The total fat content of (1/4 Cup Serving) 1/4 cup brown sugar is 0 g. Within the fat content, a 1/4 cup brown sugar contains 0 g of saturated fat, 0 g of trans fat, 0 g of polyunsaturated fat and 0 g of monounsaturated fat. The total mineral salt present in natural brown sugar is a maximum of 740 mg. Nutrition Facts. Learn More. Serving Size: 1/4 cup of packed: Amount Per Serving. There are 194 calories in a 1/4 cup of Sugar. Calories in 1/4 Cup Sugar. : Calorie Breakdown: 0% fat, 100% carbs, 0% prot. Calories. There are 207 calories in a 1/4 cup of packed Brown Sugar. There are 207 calories in a 1/4 cup of packed Brown Sugar. : Calorie breakdown: 0% fat, 100% carbs, 0% protein. Calories. Get full nutrition facts and other common serving sizes of Sugar including 1 Guideline amount per fl oz of beverage and 1 tsp. Serving Size: 1/4 cup of packed: Amount Per Serving. A single tablespoon of natural brown sugar yields just 11 calories.