Bananas are one of the most commonly eaten fruits worldwide, valued for their portability, natural sweetness, and quick energy. For anyone tracking their calorie intake, knowing exactly how many calories are in a banana can be surprisingly nuanced. The answer depends on the fruit’s size, ripeness, and even the source you consult. This article breaks down the calorie content of bananas by size, compares them with other fruits, and explores what happens when you add peanut butter. For a different take on using bananas in the kitchen, you might enjoy our Banana Cake Recipe UK.
Calorie values for bananas are well established by major health institutions and food databases. A typical medium banana provides about 105 to 110 calories, but smaller and larger specimens fall outside that range. The table below gives a quick overview of the most common sizes.
How Many Calories Are in a Banana by Size?
The calorie count climbs steadily as a banana gets longer. Extra‑small bananas (under 6 inches) contain about 72 calories, while extra‑large specimens (over 9 inches) can reach 135 calories, according to Chiquita. The differences matter most when you eat multiple bananas or combine them with other foods.
- Banana calories range from 72 to 135 depending on size, with a medium banana averaging 105 calories.
- Bananas are primarily carbohydrate (about 25 g per medium banana), with minimal protein (1 g) and fat (0 g).
- They are a good source of dietary fiber (3 g) and potassium (422 mg per medium banana).
- Adding 1 tablespoon of peanut butter adds roughly 95–100 calories, making a total of about 200 calories.
- Bananas are lower in calories than many other fruits like avocados (240 kcal per cup) but higher than apples (95 kcal medium) or oranges (62 kcal medium).
- The calorie values are averages; individual bananas may vary by about ±10%.
| Size / Reference | Calories | Carbs (g) | Protein (g) | Fiber (g) |
|---|---|---|---|---|
| Small (6–7 in) | 90 | 19 | 1 | 2.6 |
| Medium (7–8 in) | 105 | 27 | 1.3 | 3.1 |
| Large (8–9 in) | 120 | 31 | 1.5 | 3.5 |
| Per 100 g | 89 | 22.8 | 1.1 | 2.6 |
What Are the Calories and Macronutrients in a Banana?
A medium banana (118 g) provides about 105 calories, 27–28 g of carbohydrate, 1–1.3 g of protein, 3 g of fiber, 14–15 g of naturally occurring sugar, and less than half a gram of fat. Healthline reports a slightly more precise breakdown: 26.9 g carbs, 1.29 g protein, 3.07 g fiber, and 0.39 g fat. The USDA SNAP‑Ed gives similar numbers: 27 g carbs, 3 g fiber, and 1 g protein for the same serving size.
Most of a banana’s calories come from carbohydrates, with only a little protein and almost no fat. The fiber content (2–4 g depending on size and ripeness) helps slow down sugar absorption.
How many carbs in a banana?
Carbohydrates make up the vast majority of a banana’s calorie load. For a medium banana, that means roughly 27–28 g, of which about 14–15 g are natural sugars (glucose, fructose, and sucrose). The remainder comes from starch and fiber. As a banana ripens, starch converts to sugar, but the total carbohydrate count stays essentially the same.
How much protein in a banana?
Bananas are not a significant protein source. A medium banana contains about 1–1.3 g of protein, which is roughly 2% of the daily value for an average adult. For context, that is comparable to a small handful of almonds (about 2 g) but far less than a serving of yogurt or meat.
1 banana calories and protein – combined view
One medium banana delivers about 105 calories and 1.3 g of protein. If you eat a large banana, the numbers rise to about 120 calories and 1.5 g of protein. The protein contribution is minimal, so bananas are best paired with a protein source for a balanced snack.
How Many Calories in a Banana Compared to Other Fruits?
Bananas sit in the middle of the fruit calorie spectrum. They are more energy‑dense than many berries or citrus fruits but less so than dried fruits or avocados. Comparing common fruits helps put the numbers in perspective.
How many calories in an apple?
A medium apple (about 182 g) contains roughly 95 calories. That is slightly fewer than a medium banana, but apples also have more fiber (about 4.4 g) and a similar carbohydrate count (25 g). The main difference is that bananas have more sugar per gram and a higher glycemic index.
How many calories in an orange?
A medium navel orange (about 154 g) provides about 62 calories. Oranges are significantly lower in calories and carbs (15 g) than bananas, partly because they contain more water and less starch. They also offer a substantial dose of vitamin C.
Bananas have a calorie density of about 0.4 kcal/g, which is lower than many snack foods but higher than most non‑starchy fruits. Apples and oranges have even lower densities (0.5 and 0.4 kcal/g respectively, but with different water content).
How Many Calories in a Banana with Peanut Butter?
Banana and peanut butter is a classic combination, often eaten as a pre‑ or post‑workout snack or a satisfying dessert. The calorie total depends strongly on how much peanut butter you add.
WebMD notes that a medium banana has about 110 calories, while a typical 2‑tablespoon serving of peanut butter contains roughly 188 calories, 16 g of fat, 7 g of protein, and 7 g of carbs. Together, that adds up to about 298 calories, with a much higher fat and protein content than the banana alone. Peanut butter is energy‑dense, so portion control is key if you are watching your calorie intake.
One tablespoon of peanut butter adds about 94 calories. If you use two tablespoons, the combined snack can exceed 300 calories, which is more than many people expect from a simple fruit‑based treat.
How Do Banana Calories Change as They Ripen?
As a banana ripens, its starch converts into simple sugars. This process alters the glycemic response slightly but has a surprisingly small effect on total calorie count. The difference is mostly in how the body handles the energy.
- Green banana – about 88 kcal per 100 g. Higher in resistant starch, which acts like fiber and may reduce digestible calories.
- Yellow banana – about 89 kcal per 100 g. Starch has mostly converted to sugar; still similar calorie density.
- Brown‑spotted banana – about 92 kcal per 100 g. Very sweet, with slightly more sugar per gram and a marginally higher calorie density.
The changes are minimal – only a few calories per 100 g across the ripeness spectrum. Healthline emphasizes that the total calorie difference between a green and a fully ripe banana is negligible in practical terms.
What Do We Know and What Remains Uncertain About Banana Calories?
| Established information | Information that remains unclear |
|---|---|
| Calorie values for bananas are well established by USDA food databases and major health institutions. The ranges (90–120 kcal per banana) are consistent across authoritative sources. | Variation can occur due to exact fruit size, growing conditions, and ripeness. Brand‑sourced bananas may differ slightly. The calorie count is an average; individual bananas may vary by ±10%. |
Why Are Bananas So Popular and What Do They Offer Beyond Calories?
Bananas are one of the most popular fruits globally, prized for their convenience, natural sweetness, and energy density. Their moderate calorie content and high carbohydrate composition make them a favourite among athletes and active individuals. The combination of fiber and potassium supports heart health and digestion. Compared to other snacks, bananas offer a nutrient‑rich alternative with a low calorie density (about 0.4 kcal/g).
Beyond the basic macronutrients, bananas provide notable micronutrients, especially potassium (about 450 mg per medium banana) and vitamin B6. The Harvard T.H. Chan School of Public Health highlights that bananas are a good source of these nutrients and contain naturally occurring sugars plus fiber.
What Do Authoritative Sources Say About Banana Calories?
“One medium ripe banana provides about 110 calories, 0 gram fat, 1 gram protein, 28 grams carbohydrate, 15 grams sugar (naturally occurring), 3 grams fiber.”
Harvard T.H. Chan School of Public Health – Bananas
“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.”
Healthline – How Many Calories and Carbs Are in a Banana?
“A small banana of 6–7 inches long offers you around 90 calories, and a medium banana, 7–8 inches long, contains around 105 of those delightful banana calories.”
Chiquita – How many calories are in a banana?
What Is the Bottom Line on Banana Calories?
A banana is a carb‑based, moderately calorie fruit that provides steady energy and key nutrients like potassium and fiber. For most people, a medium banana (about 105–110 calories) fits easily into a balanced diet. The calorie variation by size and ripeness is small enough that precise tracking is rarely necessary unless you are counting every calorie. If you are looking for a quick snack with minimal prep, a banana remains one of the most straightforward choices. For a different take on using bananas in the kitchen, you might enjoy our Banana Cake Recipe UK.
How many calories are in a banana per gram?
A typical banana has about 0.89–0.92 calories per gram. A medium banana (118 g) provides roughly 105–110 calories, which works out to about 0.89–0.93 kcal/g. The value increases slightly as the banana ripens.
How many calories are in two bananas?
Two medium bananas contain approximately 210 calories, with 54 g of carbohydrates, 2.6 g of protein, and 6.2 g of fiber. If you use large bananas, that rises to about 240 calories.
Is a banana good for weight loss?
Bananas can be part of a weight‑loss diet because they are relatively low in calories and provide fiber that promotes satiety. However, their carbohydrate content means portion control is still important, especially if you are on a low‑carb plan.
How much fiber is in a banana?
A medium banana contains about 3 g of fiber. Chiquita notes that fiber content can range from 2–4 g depending on size and ripeness. The fiber is a mix of soluble and insoluble types.
How many calories in a banana compared to an apple?
A medium banana has about 105–110 calories, while a medium apple has about 95 calories. The apple has slightly more fiber and less sugar, but the difference is modest.
Does freezing a banana change its calorie count?
Freezing does not change the calorie content. However, thawed bananas become very soft and sweet because the cell structure breaks down, making them ideal for smoothies and baking.
Are banana chips higher in calories than fresh bananas?
Yes, banana chips are much higher in calories because they are typically fried or oil‑coated. A 100 g serving of banana chips can contain over 500 calories, compared to 89 calories for 100 g of fresh banana.
How many calories in a banana with a tablespoon of peanut butter?
A medium banana (105–110 kcal) plus one tablespoon of peanut butter (about 94 kcal) totals roughly 200 calories. The combination provides more fat and protein than the banana alone.
What is the glycemic index of a banana?
The glycemic index of a banana ranges from about 42 to 62, depending on ripeness. Underripe bananas have a lower GI, while fully ripe bananas have a higher GI because the starch has converted to sugar.
Fiona Caldwell is Managing Editor at TradeWireUK.uk, running the daily news list, the publishing schedule and the newsroom workflow.