🍌 Banana Calorie Calculator
Calculate how many calories are in a banana by weight, size or number of bananas. See estimated carbohydrates, sugars, fibre, protein and potassium for your portion.
Choose the approximate edible weight without the peel. Ripeness affects texture and sugar composition, but its effect on total calories is not reliably represented by a fixed percentage.
Banana calories by size
The calories in a banana depend mainly on its edible weight. These estimates use approximately 89 calories per 100g of raw banana flesh.
| Serving | Edible weight | Calories |
|---|---|---|
| Small banana | ~81g | 72 kcal |
| Medium banana | ~105g | 93 kcal |
| Large banana | ~126g | 112 kcal |
| Extra-large banana | ~152g | 135 kcal |
| Half a large banana | ~63g | 56 kcal |
| Two medium bananas | ~210g | 187 kcal |
These are approximate values. Banana length and weight vary, so weighing the peeled fruit gives a more precise estimate.
Banana nutrition per 100g
Bananas provide carbohydrates for energy, along with fibre, potassium and small amounts of protein and fat. The table below compares typical values per 100g with a large banana weighing approximately 126g without its peel.
| Nutrient | Per 100g | Large banana (126g) |
|---|---|---|
| Calories | 89 kcal | 112 kcal |
| Carbohydrates | 22.8g | 28.7g |
| — Sugars | 12.2g | 15.4g |
| — Fibre | 2.6g | 3.3g |
| Protein | 1.1g | 1.4g |
| Fat | 0.3g | 0.4g |
| Potassium | 358mg | 451mg |
| Magnesium | 27mg | 34mg |
| Vitamin B6 | 0.37mg | 0.47mg |
| Vitamin C | 8.7mg | 11mg |
Nutritional values are averages for raw banana flesh and may vary with variety, growing conditions and ripeness.
How many calories are in half a banana?
Half a banana contains roughly half the calories of a whole banana of the same size. Half a medium banana (about 52g of edible flesh) provides around 47 calories, while half a large banana (about 63g) provides approximately 56 calories.
If you are tracking your food intake, weigh the portion after peeling it. This avoids including the weight of the peel, which is not normally eaten.
Are bananas good for sport and exercise?
Bananas are a convenient snack before or after exercise. They provide carbohydrates that the body can use for energy, as well as potassium and vitamin B6. A large banana contains around 112 calories and 29g of carbohydrates, making it a practical option before a workout or as part of a recovery meal.
As a banana ripens, some of its starch is converted into sugars, changing its sweetness and texture. Green bananas generally contain more resistant starch, while ripe bananas tend to taste sweeter. The exact effect on digestion and blood glucose varies from person to person and with the rest of the meal.
How to calculate banana calories
The calculator uses an average reference value of 89 calories per 100g of edible banana. Enter the weight of the peeled banana, choose a size, or select the number of bananas to estimate the calories in your portion.
Formula
Calories = edible weight in grams × 89 ÷ 100
For example, a banana with 120g of edible flesh contains approximately 107 calories. The result is an estimate, not a laboratory measurement of the specific fruit you eat.