105 kcal (medium)
Banana calories by size
Updated October 11, 2026 · MyPlate
Short answer: a medium banana (about 118 g) has roughly 105 calories. That comes with 1.3 g protein, 27 g carbs (14 g of it natural sugar), 0.4 g fat, and 3.1 g fiber. Bananas are also high in potassium and vitamin B6.
The banana is one of the most-logged foods on the planet, and the number people usually quote — around 100 calories — is close to right for a medium one. But "banana" covers a wide range of sizes, so what you actually eat can swing from about 90 to about 121 calories depending on how big it is.
Banana calories by serving size
| Serving | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|
| Small (101 g) | ~90 kcal | — | — | — |
| Medium (118 g) | 105 kcal | 1.3 g | 27 g | 0.4 g |
| Large (136 g, scaled) | ~121 kcal | — | — | — |
| Per 100 g | 89 kcal | — | — | — |
A medium banana is mostly carbohydrate — about 27 g, of which 14 g is natural sugar and 3.1 g is fiber. There's very little fat (0.4 g) and a small amount of protein (1.3 g). On top of the macros, a banana delivers around422 mg of potassium and a solid dose of vitamin B6.
How a banana fits your calorie goal
Whether a banana helps or hurts depends entirely on your daily target. At roughly 105 calories, a medium banana is an easy fit for most people — start by finding your number with thecalorie calculator, then decide how the banana lands against it. If you're losing weight, remember that fat loss comes down to an overallcalorie deficit, and a banana's fiber makes it more filling than its calorie count suggests, which helps you stay under target. Another whole fruit is anorange.
For muscle or performance, a banana is a fast, low-fat source of carbs — handy before or after a workout — but it's light on protein, so pair it with a protein source if you're using it as a recovery snack. If you're dialing in your macros, see how the numbers add up incalories in protein, carbs & fat.
Log your banana in seconds
The hard part of hitting a calorie goal isn't one banana — it's logging everything accurately, every day. The MyPlate app lets you add a banana (and everything else) by photo or barcode in seconds, so its calories land in your daily total without any guesswork. Browse more everyday numbers in calories in common foods.
Frequently asked questions
How many calories in one banana?
A medium banana (about 118 g) has roughly 105 calories. It also gives you 1.3 g of protein, 27 g of carbs (14 g of that is natural sugar), 0.4 g of fat, and 3.1 g of fiber. Bananas are also high in potassium (around 422 mg) and vitamin B6, which is part of why they are such a popular pre- and post-workout snack.
How many calories are in a small vs. large banana?
USDA FoodData Central lists raw banana at 89 kcal per 100 g (FDC 173944). The medium portion in that record is 118 g and 105 kcal. Scaling the same 89 kcal/100 g figure gives about 90 kcal at 101 g and about 121 kcal at 136 g. Weigh yours if the size is different.
Is a banana good for weight loss?
Yes. At about 105 calories, a medium banana is filling for its calorie cost thanks to 3.1 g of fiber, and it satisfies a sweet craving with natural sugar rather than added sugar. Weight loss still comes down to your overall calorie deficit, but a banana fits easily into most plans and makes a convenient, portable snack.
What are the macros in a banana?
A medium banana is mostly carbohydrate: about 27 g of carbs (14 g sugar, 3.1 g fiber), plus 1.3 g of protein and just 0.4 g of fat. That works out to roughly 105 calories. It is a low-fat, carb-forward food — great for quick energy, less so as a protein or fat source.