Calories in Banana: Protein, Carbs and Fat per 100 g and per Serving
Quick answer: A medium banana (7 to 7⅞ inches, 118 g peeled) has about 105 kcal: 27 g of carbohydrate, of which 14 g is sugar and 3.1 g is fiber, plus 1.3 g of protein and 0.4 g of fat. Per 100 g a raw banana is 89 kcal. Almost all of the energy is carbohydrate, so the size of the banana is the only thing that moves the number — a small one is about 90 kcal, an extra large one about 135.
Calories by size
Weights are for the peeled fruit, using the USDA size bands by length.
| Size | Weight | Calories | Protein | Carbs | Sugar | Fiber |
|---|---|---|---|---|---|---|
| Extra small (under 6") | 81 g | 72 kcal | 0.9 g | 19 g | 9.9 g | 2.1 g |
| Small (6" to 6⅞") | 101 g | 90 kcal | 1.1 g | 23 g | 12 g | 2.6 g |
| Medium (7" to 7⅞") | 118 g | 105 kcal | 1.3 g | 27 g | 14 g | 3.1 g |
| Large (8" to 8⅞") | 136 g | 120 kcal | 1.5 g | 31 g | 17 g | 3.5 g |
| Extra large (9" or longer) | 152 g | 135 kcal | 1.7 g | 35 g | 19 g | 4.0 g |
| 1 cup, sliced | 150 g | 135 kcal | 1.6 g | 34 g | 18 g | 3.9 g |
| 1 cup, mashed | 225 g | 200 kcal | 2.5 g | 51 g | 28 g | 5.9 g |
Fat stays under 1 g for every size in the table. If you weigh food, the per-100 g line below is the more accurate way to log: banana length is a rough guide, and the same length can be thicker or thinner.
Per 100 g nutrition
Raw banana, peeled, per 100 g:
| Nutrient | Amount |
|---|---|
| Calories | 89 kcal |
| Protein | 1.1 g |
| Fat | 0.3 g |
| Saturated fat | 0.1 g |
| Carbohydrate | 23 g |
| Sugars | 12 g |
| Fiber | 2.6 g |
| Water | 75 g |
| Potassium | 358 mg |
| Magnesium | 27 mg |
| Vitamin C | 8.7 mg |
| Vitamin B6 | 0.37 mg |
About three quarters of a banana's weight is water, which is why it is low in calories per gram compared with dried fruit. Potassium is the nutrient bananas are known for: a medium banana gives about 420 mg.
Forms and variants
Drying removes the water and concentrates everything else; frying adds fat. Per 100 g:
| Form | Calories | Protein | Fat | Carbs | Sugar | Fiber | FDC ID |
|---|---|---|---|---|---|---|---|
| Raw banana | 89 kcal | 1.1 g | 0.3 g | 23 g | 12 g | 2.6 g | 173944 |
| Dehydrated banana or banana powder | 345 kcal | 3.9 g | 1.8 g | 88 g | 47 g | 9.9 g | 173945 |
| Banana chips (snack) | 520 kcal | 2.3 g | 34 g | 58 g | 35 g | 7.7 g | 168849 |
Banana chips are the one to watch. A 1 oz (28 g) handful is about 145 kcal and 9.5 g of fat, most of it saturated (29 g of the 34 g per 100 g) — more energy than a medium banana in a portion that takes a minute to eat. Packaged chips vary by brand, so for a specific bag use the label.
Banana and a calorie deficit
A banana fits a deficit the same way any food does: by its calories against your daily target. At about 105 kcal for a medium one, with 3.1 g of fiber and almost no fat, it is an easy snack to count accurately — the only variable is size. Two medium bananas a day add about 210 kcal; whether that fits depends on the rest of the day, not on the banana.
Where bananas add up quietly is in mixed foods: a smoothie with two bananas, a banana with nut butter, banana bread. Log the banana as its own line and the extras separately. For setting the daily target itself, see how to set a calorie deficit for weight loss.
How to log it
Voice is the quickest: "one medium banana" or "a large banana". Size is the one fact the app needs, so say it.
Photo recognises a banana easily, but size is harder to judge from a picture. A banana next to a mug or a hand gives the app scale; otherwise add "small" or "large" as a note. For bananas in a smoothie or a bowl, say how many went in.
Barcode is for packaged products — dried banana, banana chips, banana bread — where the brand's label is the right source. A loose banana has no barcode.
CalMePlease logs a banana from a voice note or a photo and returns carbs, sugar and fiber alongside calories. More on voice food logging.
FAQ
How many calories are in a banana? A medium banana (118 g peeled) is about 105 kcal. Small is about 90, large about 120, extra large about 135.
How many calories are in 100 g of banana? 89 kcal per 100 g of raw, peeled banana, with 23 g of carbohydrate, 12 g of sugar, 2.6 g of fiber, 1.1 g of protein and 0.3 g of fat.
How much sugar is in a banana? About 14 g in a medium banana and 12 g per 100 g. It comes with 3.1 g of fiber in a medium banana.
How much protein is in a banana? Very little: about 1.3 g in a medium banana. Bananas are a carbohydrate food; pair one with yogurt, milk or eggs if you want protein in the same snack.
Are banana chips healthier than a banana? Not by calories. Per 100 g, banana chips are 520 kcal and 34 g of fat against 89 kcal and 0.3 g of fat for a raw banana. A 28 g handful of chips is about 145 kcal — more than a medium banana.
How much potassium is in a banana? 358 mg per 100 g, so about 420 mg in a medium banana.
Data: USDA FoodData Central, SR Legacy — Bananas, raw (FDC ID 173944); Bananas, dehydrated, or banana powder (FDC ID 173945); Snacks, banana chips (FDC ID 168849). Portion weights from the 173944 record. Values checked October 2026.
Related: How much fiber per day · Calorie deficit for weight loss · Calories in nuts and seeds
CalMePlease logs a banana by size from a voice note or a photo, with carbs, sugar and fiber per serving. Free on the App Store.
