According to TheScienceofEating.com, 1 cup of couscous provides 176 calories. Higher in protein than rice and other grains, a 1-cup serving of couscous contains 6 grams of protein.
TheScienceofEating.com states that couscous is a more nutritional substitution for starches such as rice or quinoa. Couscous is mostly made of carbohydrates; 1 cup contains 38 grams. A 1-cup serving of couscous also contains 61 percent of the recommended daily value of selenium and 39 percent of the daily recommended value of potassium. Whole grain couscous contains more fat than white flour couscous, but it has a higher amount of fiber and an overall higher nutritional value.