Calories in a banana: small, medium and large
October 12, 2026 · 3 min read
A medium banana (about 118 g peeled) has roughly 105 calories. Per 100 g that is 89 calories. Almost all of it comes from carbohydrate: about 27 g in a medium banana, with 3 g of fiber, 1.3 g of protein and next to no fat.
Banana calories by size
| Banana (peeled) | Weight | Calories | Carbs |
|---|---|---|---|
| Small | about 100 g | 90 kcal | 23 g |
| Medium | about 118 g | 105 kcal | 27 g |
| Large | about 136 g | 120 kcal | 31 g |
| Per 100 g | 100 g | 89 kcal | 23 g |
The peel is roughly a third of the total weight. If you weigh a banana with the skin on, a 180 g banana gives you about 118 g of fruit.
Ripe versus green
Ripening does not add calories. It changes the type of carbohydrate: a green banana holds more starch, some of it resistant starch that behaves like fiber, while a spotted one has converted most of that starch into sugar. A ripe banana tastes sweeter and raises blood sugar faster, but the calorie count is practically the same.
What else is in a banana
- Potassium: about 420 mg in a medium banana, roughly 10 percent of what an adult needs in a day.
- Vitamin B6: roughly a quarter of the daily requirement.
- Fiber: about 3 g, which is why a banana is more filling than the same calories of juice.
Dried bananas and banana chips
Drying removes water and concentrates everything. Dried banana is around 350 calories per 100 g, and fried banana chips reach about 520 calories per 100 g because of the added oil and sugar. A small handful (30 g) of chips has more calories than a whole fresh banana.
Are bananas good for weight loss?
They fit without any trouble. A banana is a 100-calorie snack that is easy to carry and needs no preparation. What matters is your total for the day, not the banana itself; the principle is covered in the calorie deficit guide.
Two practical notes:
- A banana on its own is mostly carbohydrate. Pair it with yogurt, cottage cheese or a spoon of peanut butter and it keeps you full for longer.
- Smoothies are where the calories hide. Two bananas, milk, oats and peanut butter easily pass 500 calories.
Before or after training?
Both work. A banana 30–60 minutes before exercise gives you quick energy that is easy on the stomach. After training, combine it with a protein source to help recovery; see how much protein you need per day.
Logging fruit without weighing it
Fruit sizes vary a lot, and few people weigh a banana. In Cal Crew you take a photo of your snack or breakfast bowl and AI estimates the calories and macros for everything in the picture. You can adjust the portion if the estimate looks off.