How Many Calories in a Banana? Edible Weight and Easy Portion Math

How many calories does banana contain?

For the numbers in this guide, banana means “Bananas, raw” (USDA FoodData Central 173944). It contains 89 kcal per 100 g edible portion. A banana entry describes edible fruit, not the peel. A banana blended into a smoothie still contributes its full ingredient amount. Keeping that definition attached to the number prevents a plain ingredient from being mistaken for a prepared meal.

A weighed 100 g portion provides approximately 89 kcal: 100 × 89 ÷ 100. A smaller 50 g portion gives 44.5 kcal, while 150 g gives 133.5 kcal. These are calculated amounts of the named food, not claims about the weight of a standard piece, cup or restaurant serving.

What comes with those calories?

The same 100 g reference provides 1.1 g protein, 22.8 g total carbohydrate, 0.3 g fat and 2.6 g fiber. For the illustrated 100 g portion, those amounts become 1.1 g protein, 22.8 g carbohydrate, 0.3 g fat and 2.6 g fiber. Calories and individual nutrients describe different parts of the food, so keep all of them on the same portion basis when reading the table.

The peel belongs outside the edible weight. A banana eaten whole and the same banana blended into a smoothie contribute the same ingredient amount, although the smoothie also contains its other ingredients.

Weighing banana without guessing a serving

Peel first, then weigh what you eat. For half a banana, weigh the half rather than assuming every banana is the same size. A useful kitchen sequence is to place an empty bowl on the scale, tare it to zero, add the edible banana, and note the grams before combining it with other foods. If you serve only part of that amount, record the part eaten. Leftovers matter because the amount available and the amount consumed are different quantities.

Cutting a banana into coins makes a cereal topping easier to distribute but does not reduce its energy. If some is left over, weigh the leftover edible pieces and subtract them from the starting portion.

Banana in cereal, smoothies and dried snacks

A banana blended into a smoothie contributes the same ingredient amount as that banana eaten whole. The smoothie also includes whatever else you add: milk, yogurt, nut butter or sweetener. Log those components separately instead of using the fruit number as the drink total.

Dried banana and banana chips need their own records because water content and added ingredients differ. For a cereal topping, weigh the peeled banana pieces you actually use. If some remains on the board, leave that amount outside the eaten portion.

How banana compares with apple

The comparison food is “Apples, raw, with skin (Includes foods for USDA's Food Distribution Program)” (FDC 171688), which contains 52 kcal per 100 g. At equal 100 g weights, the banana reference supplies 89 kcal and apple supplies 52 kcal: a difference of 37 kcal. That is a calculation for these records, not a universal ranking of foods or an instruction to exchange equal portions.

Compare the nutrients as well as the energy in the named records below. A food with a different water content, texture or role in the meal may not be a direct substitute. For a real swap, compare the amounts you plan to eat and include the rest of the plate, rather than choosing solely from the lower number in a 100 g table.

Make fruit logging easier with BiteCal

Take a photo in BiteCal and check the proposed banana entry and portion before saving. If you know the edible gram weight, use it to review the estimate. The photo workflow reduces the need to start every meal with manual typing.

Try BiteCal free for calorie and macro views, a connected daily diary and a friendly little white bear. A weighed portion remains a useful reference while the app makes the everyday record more convenient.

Frequently asked questions