· How Many Calories and Carbs Are in a Banana? Bananas are extremely healthy and contain several important nutrients. A medium banana only contains 105 calories, on average. However, more than 90%... Learn about the nutritional value, types, and health benefits of bananas. One medium ripe banana provides about 110 calories, 3 grams of fiber, and 450 mg of potassium. · A medium banana typically contains about 105 calories, but this can range from 72 calories in an extra small banana to 135 calories in an extra large one. Calorie and nutritional information for a variety of types and serving sizes of Bananas is shown below. Find detailed calories information for Bananas including Popular Banana Serving Sizes and Standard Banana Serving Sizes. · Here is the nutritional breakdown for one medium banana (118g): A medium banana has about 27 grams of carbs. This is what makes them such a fantastic source of quick energy, which is why athletes often eat them before or during competition. The Role of Bananas in Weight Management Plans If you’re counting calories for weight loss or maintenance, understanding how many calories does a banana have is crucial. With just over 100 calories per medium fruit, bananas fit well into most diets. Their fiber content promotes fullness, reducing overall calorie intake throughout the day. 6 days ago · Discover the nutritional value of bananas, including calories, carbs, and health benefits. Expert, evidence-based advice for your diet.