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How Many Calories in a Banana?

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How Many Calories in a Banana?

Banana is a fruit which is widely available, inexpensive and flexible. For a boost of energy and a creamier feel, you can just eat one on the go, add some peanut butter, or use it in a smoothie. The combination of what you eat during the day, along with how active you are, will have the greatest effect, especially in the long term, on your weight loss.

You will wonder if you know about the health benefits of bananas. Bananas are high in carbohydrates.  Calories of bananas are composed mainly of complex carbohydrates, including resistant starch, which has advantages for digestive health. For your blood pressure and general health, the vitamins, calories and potassium in bananas are healthy.

Some of the specifics about this common fruit are below.

Calories in Various Sizes of Bananas

First of all, how many calories are there in a raw, ripe banana?

The US Department of Agriculture says:

  • A small banana of around 101 grams has 90 calories;
  • There are 105 calories in a medium-sized banana (about 118 grams);
  • And a big one (around 136 grams) has 121 calories in it.

Calories alone do not tell anything about the food's consistency. So let's look at the truth about banana nutrition, and where all those calories come from.

Nutrition Facts of Banana

The USDA offers the following dietary details for one medium banana.

  • Calories: 105
  • Fat: 0.4g
  • Sodium: 1.2mg
  • Carbohydrates: 27g
  • Fiber: 3.1g
  • Sugars: 14.4g
  • Protein: 1.3g



Carbs are  the main fuel for our body and brain.  They account for 90% of banana calories. Carbs are an umbrella term for sugars, starches, and fibers, and their advantages are determined by the combination of these three. The greener the banana, the more starch it contains, and the less sugar it has.

The starch becomes sugar in a ripe banana.Considering that the recommended daily intake of sugar for a woman is 25 gm and 38 gm for men, 12 grams of sugar per 100 grams of banana may scare you. The consistency of banana sugar, however, varies from the added sugar you consume with a cup of coffee in a frappuccino or a cake.  So, be aware, but don't be scared.


Fiber is a type of carbohydrate that our body is unable to digest, and it is good quality. It monitors the use of sugar, avoids a sugar crash that leaves us after the meal with little energy, and plays a role in the health of the gut.

Around 10 percent of the daily fiber needs are fulfilled by just one average-sized banana. For several diseases, the fiber in bananas mitigates risk factors. This helps lower levels of cholesterol and slows down digestion, helping you feel complete for longer.


Bananas, with less than 1/2 gram per medium-sized banana, are low in fat.


Bananas are poor in protein. Just about 1.3 grams of protein is produced by medium-sized fruit. But more important than quantity is the consistency of protein in a banana. Some reports indicate that lectin suppresses cancer cell proliferation, a protein that occurs in bananas.

Nevertheless, bananas remain one of the most popular fruits and snacks among individuals with an active lifestyle because of other features.

It's important to also note the level of:

  • Starch: 5.38 g
  • Magnesium: 27 mg.
  • Potassium: 358 mg
  • Vitamin C: 8.7 mg.

An average banana contains 12% of the daily potassium intake recommended and 17% of the daily vitamin C recommended. If all those numbers don't make any sense for now, just wait and we're going to cover how those micronutrients impact your daily life.

Minerals and Vitamins

Bananas are known for their potassium content, offering 422 mg of potassium in one medium-sized banana, or about 9 percent of the daily value set by the USDA. Bananas contain some vitamin C, folate, magnesium, and choline alongside potassium.

Glycemic Index of a Banana

Different types of carbs all come together in a banana, and what is important to know is the percentage of starches, sugars, and fiber. Bananas are quite high in sugar, but a banana is a low glycemic fruit because of the amount of fiber and starches.

  • The score on the glycemic index for green bananas is around 30.
  • A ripe banana's GI is around 51.

This means your blood sugar rises gradually after eating a banana. Low glycemic index foods are also associated with lowering cholesterol levels, regulating blood sugar levels and preventing diseases associated with these conditions.

The list of health benefits associated with bananas includes:

  • Heart health promotion
  • Blood Pressure Regulation
  • Avoidance of kidney stones
  • Reduction of stroke hazards
  • Relief from pain of muscle cramps and pain
  • Anxiety alleviation and signs of stress
  • Improved sleep quality
  • Sleep Disorder Care

Final Thoughts

We prefer to underestimate the banana as a simple fruit. Although a banana's number of calories is low, it contains a wide range of nutrients. There are 105 calories in one medium banana, 90 percent of which are carbohydrates. But carbs do not affect the health or form of a banana. Fiber, magnesium, potassium, and other vitamins are rich in bananas. This unusual composition of nutrients makes bananas much more than a sweet treat.

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