A small apple typically contains around 50 to 55 calories. For example, a small apple weighing about 100 grams has approximately 52 calories

, and other sources indicate about 54 to 55 calories for a small apple

. Some variations list slightly higher values around 77 to 78 calories for a small apple weighing closer to 150 grams

, but the most consistent estimate for a typical small apple is about 50-55 calories.