Calories in Banana

Data reviewed 2026-09-08 against USDA FoodData Central (SR Legacy).

A 100 g serving of banana has about 89 kcal, with 1.1 g of protein, 22.8 g of carbohydrate (2.6 g of that fibre) and 0.3 g of fat. The table below gives the full breakdown and the most common portion sizes.

Nutrition per 100 g

NutrientPer 100 g
Calories89 kcal
Protein1.1 g
Carbohydrate22.8 g
Fibre2.6 g
Sugars12.2 g
Fat0.3 g
Saturated fat0.1 g
Sodium1 mg
Cholesterol0 mg

Common portions

PortionWeightCalories
cup, mashed225 g200 kcal
cup, sliced150 g134 kcal
extra small (less than 6" long)81 g72 kcal
small (6" to 6-7/8" long)101 g90 kcal
medium (7" to 7-7/8" long)118 g105 kcal
large (8" to 8-7/8" long)136 g121 kcal

Log banana in a recipe

To see how banana affects a whole dish, drop it into the recipe calorie calculator with the rest of your ingredients — it totals calories, protein, carbs and net carbs for the recipe, per serving and per 100 g. The methodology shows the exact arithmetic.

Frequently asked questions

How many calories are in banana?

About 89 kcal per 100 g. Portion calories depend on how much you use — see the portions table above for common amounts.

How much protein is in banana?

Banana has roughly 1.1 g of protein per 100 g.

Is banana keto-friendly?

Its net carbs are about 20.2 g per 100 g (total carbs 22.8 g minus 2.6 g fibre). Whether it fits your day depends on portion size and your carb target.

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