calories navel orange
Serving Size and Calories. As a food item packed by nature, it can be difficult to determine the exact serving size and calories per serving of a navel orange. According to the USDA Nutrient Database, a 2 7/8-inch diameter navel orange contains 69 calories. Carbohydrates, Fat and Protein Each 2 7/8-inch diameter navel orange contains 17.5 g of carbohydrates, 3 g of fiber, 1 g of protein and less than 1 g of total fat. Carbohydrates turn into glucose during digestion and act as a source of fuel for your cells. The USDA recommends 45 to 65 percent of your total calories come from carbohydrates.