Calories in a Banana: Nutrition Facts by Size
A medium banana has about 105 calories. See the complete nutrition breakdown by size with expert FAQ.
Bananas are one of the world's most popular fruits and a go-to source of quick energy. They are rich in natural sugars, potassium, vitamin B6, and dietary fiber. Here is a full breakdown of banana nutrition by size.
Calories by size:
| Size | Weight | Calories | Carbs | Sugar | Fiber | Potassium |
|---|---|---|---|---|---|---|
| Small | ~80 g | 72 kcal | 19 g | 10 g | 2 g | 290 mg |
| Medium | ~118 g | 105 kcal | 27 g | 14 g | 3 g | 422 mg |
| Large | ~136 g | 121 kcal | 31 g | 17 g | 3.5 g | 487 mg |
| Extra-large | ~152 g | 135 kcal | 35 g | 19 g | 4 g | 544 mg |
Bananas are naturally fat-free and cholesterol-free, making them an excellent pre-workout snack or a convenient on-the-go energy source.
Frequently Asked Questions (FAQ)
How many calories are in a medium banana?
A medium banana weighing about 118 grams contains approximately 105 calories. The vast majority of those calories come from carbohydrates — about 27 grams total, of which 14 grams are natural sugars and 3 grams are dietary fiber.
Are bananas good for weight loss?
Bananas can be part of a weight-loss diet when eaten in moderation. They are relatively low in calories for their size, high in fiber to keep you full, and their natural sweetness can satisfy sugar cravings. A medium banana has fewer calories than most packaged snacks.
Are bananas high in sugar?
A medium banana contains about 14 grams of natural sugar. However, bananas also contain fiber that slows sugar absorption, giving them a moderate glycemic index of around 51. This means they do not cause the rapid blood sugar spikes associated with refined sugars.
When is the best time to eat a banana?
Bananas are excellent before or after workouts. Before exercise, they provide quick-digesting carbohydrates for energy. After exercise, their potassium and natural sugars help replenish glycogen stores and support muscle recovery.
Do bananas have a lot of potassium?
Yes. A medium banana provides about 422 mg of potassium, which is roughly 9% of the recommended daily intake. Potassium is critical for maintaining healthy blood pressure, proper muscle contractions, and nerve signaling.
How many calories are in a medium banana?
Are bananas good for weight loss?
Are bananas high in sugar?
When is the best time to eat a banana?
Do bananas have a lot of potassium?
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