A typical medium-sized apple (about 182 grams) contains approximately 95 calories. The calories come mostly from carbohydrates, primarily natural sugars like fructose, glucose, and sucrose, alongside dietary fiber. Apples are very low in fat and protein, with about 0.3 grams of fat and 0.5 grams of protein per medium apple. The calorie content can vary slightly depending on the size and variety of the apple but generally ranges from about 77 calories for a small apple to 116 calories for a large one.