A typical serving of banana (1 medium, 118 g) has about 105 calories. Per 100 g: 89 kcal, 1.1 g protein, 22.8 g carbs, 0.3 g fat. The same 100 g carries 2.6 g of fiber and 12.2 g of sugar. Most of the energy comes from carbohydrate.
| Serving | Weight | Calories |
|---|---|---|
| 1 medium | 118 g | 105 kcal |
| 1 large | 136 g | 121 kcal |
| 1 small | 101 g | 90 kcal |
| 1 cup, sliced | 150 g | 134 kcal |
| 100 g | 100 g | 89 kcal |
The default portable snack: sweet, filling for its 105 calories, and wrapped by nature. On the energy-density scale, 89 kcal per 100 g puts banana at the low end.
A typical serving (1 medium, 118 g) has about 105 calories, and 100 g has 89 kcal. Calories scale with weight, so double the portion means double the number.
There are 1.1 g of protein in 100 g of banana, which works out to about 1.3 g per serving (1 medium). Treat it as an energy source rather than a protein source.
Sugar comes to 12.2 g per 100 g, so 1 medium (118 g) delivers roughly 14 g. That sugar is already counted inside the calorie figures on this page.
Every value on this page comes from USDA FoodData Central, entry 173944 (SR Legacy). Serving figures are converted from the per-100-g data, so rounding can shift a total by a calorie or two.
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Get JoulesA note on accuracy: calculators like this one provide estimates based on population-level formulas — your real needs vary with genetics, muscle mass, medical conditions, and more. Results are for information only and are not medical advice, a diagnosis, or a prescription. Talk to a doctor or registered dietitian before making significant changes to your diet or exercise, especially if you have a health condition, are pregnant, or are under 18.
Nutrition data: USDA FoodData Central, FDC ID 173944 (SR Legacy). Serving calories are computed from the per-100-g values.
