How many calories in a Fuji apple? A medium sized Fuji apple has 80 calories. A Fuji apple contains 22g carbohydrates, 5g dietary fiber, 17g sugar, calcium 2%, iron 2%, vitamin A 2% and vitamin C 20%. These apples are very filling low in fat and high in carbohydrates, hence it‘s always a good choice for a person with high cholesterol. It is popular for making salads and is a healthy diet. Vitamins and minerals that increase the Immune system are rich in Fuji apples.