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How many calories are in a banana?

How Many Calories and Carbs Are in a Banana?
Bananas are extremely healthy and contain several important nutrients. A medium banana only contains 105 calories, on average. However, more than 90% of a banana is composed of carbs.

People generally know that bananas are very nutritious, but many wonder how many calories and carbs they actually contain.

This article answers those questions.

How many calories are in various sizes of bananas?
Bananas contain around 100 calories, but this can vary by the fruit size and how you consume it. Below are the calorie contents of standard banana sizes (1Trusted Source):

Extra small (shorter than 6 inches, 81 grams): 72 calories
Small (6–7 inches, 101 grams): 90 calories
Medium (7–8 inches, 118 grams): 105 calories
Large (8–9 inches, 136 grams): 121 calories
Extra large (9 inches or longer, 152 grams): 135 calories
Sliced (1 cup, 150 grams): 134 calories
Mashed (1 cup, 225 grams): 200 calories
If you’re unsure about the size of your banana, you can estimate that an average banana contains about 100 calories.

About 93% of a banana’s calories come from carbs, 4% from protein, and 3% from fat.

SUMMARY
The calorie content of a banana ranges from 72–135 calories depending on its size. An average-sized banana contains about 100 calories.


How many carbs are in a banana?
Bananas are almost exclusively composed of water and carbs.

People who watch their carb intake are interested in knowing the carb content of their food.

Here is the carb content of standard banana sizes (1Trusted Source):

Extra small (shorter than 6 inches, 81 grams): 19 grams
Small (6–7 inches, 101 grams): 23 grams
Medium (7–8 inches, 118 grams): 27 grams
Large (8–9 inches, 136 grams): 31 grams
Extra large (9 inches or longer, 152 grams): 35 grams
Sliced (1 cup, 150 grams): 34 grams
Mashed (1 cup, 225 grams): 51 grams
A banana also contains 2–4 grams of fiber, depending on its size. You can subtract 2–4 grams if you are looking for the “net” carb content (net carbs = total carbs – fiber).

Additionally, a banana’s ripeness may affect its carb content.

Generally, green or unripe bananas contain fewer digestible carbs than ripe bananas.

SUMMARY
An average-sized banana contains about 25 grams of carbs — maybe even less if the banana is unripe (green).

Unripe (green) bananas contain more resistant starch
The main nutrient in bananas is carbs, but the carb composition changes drastically during ripening.

Unripe bananas contain high amounts of starch, and some of it is resistant starch (2Trusted Source).

Because the starch in a banana is converted to sugar during ripening, yellow bananas contain much less resistant starch than green ones. In fact, the resistant starch content of a fully ripe banana is less than 1% (2Trusted Source).

Resistant starch is a type of indigestible carbohydrate that escapes digestion and functions like fiber in the body.

It reaches the colon undigested. There, it feeds friendly gut bacteria (3Trusted Source, 4Trusted Source).

When the bacteria digest resistant starches, they form gases and short-chain fatty acids (SCFAs), which are important for digestive health (5Trusted Source, 6Trusted Source).

About 95% of these SCFAs are then rapidly absorbed by the cells in the colon and used by the body for energy (5Trusted Source, 7, 8Trusted Source, 9Trusted Source).

So although resistant starches will not yield as many calories as regular carbs during digestion, they may be transformed into SCFAs that provide calories later.

Therefore, green and yellow bananas may provide similar amounts of calories in the end.

SUMMARY
Unripe bananas contain high amounts of resistant starch. Resistant starch escapes digestion and feeds the friendly bacteria in your gut, which use it to produce short-chain fatty acids.


Bananas contain many other beneficial nutrients
Bananas contain good amounts of several vitamins and minerals.

One medium banana contains (1Trusted Source):

Fiber: 3.1 grams
Vitamin B6: 25% of the DV
Vitamin C: 11% of the DV
Manganese: 14% of the DV
Potassium: 12% of the DV
Folate: 6% of the DV
Riboflavin (vitamin B2): 5% of the DV
Bananas are tasty and nutritious. They make an excellent, healthy, and low calorie snack.

SUMMARY
Bananas contain good amounts of fiber, vitamin B6, manganese, vitamin C, folate, and potassium.

The bottom line
Bananas generally contain 72–135 calories and 19-35 grams of carbs, depending on their size.

An average-sized banana contains about 100 calories and 25 grams of carbs.

Last medically reviewed on August 3, 2021





gpt
The calorific content of a banana depends on the banana's size. An average-sized banana contains around 100 calories, while an extra-large banana can provide about 135 calories. Bananas are a nutrient-rich fruit and a good source of dietary fiber.