Banana Calories: Medium, Large, and Carbs
A medium banana (about 118 g without the peel) is about 105 kcal, 1 g protein, 27 g carbohydrate, 0.4 g fat, and 3 g fiber on USDA FoodData Central rows. A large banana (~136 g) is about 121 kcal. Peel color changes sweetness more than it changes the calorie line.
You do not need a special banana formula. You need a size habit, or one weigh-in so the next ten bananas are not a guess.
Calories and carbs by size
USDA-style rows for raw banana scale with edible weight. Use the table, then look at the fruit in your hand.
| Size (USDA habit) | Edible weight | kcal | Carbohydrate | Fiber | Net carb (carb − fiber) |
|---|---|---|---|---|---|
| Extra small / mini | ~80–90 g | ~70–80 | ~18–21 g | ~2 g | ~16–19 g |
| Small | ~101 g | ~90 | ~23 g | ~2.6 g | ~20 g |
| Medium | ~118 g | ~105 | ~27 g | ~3.1 g | ~24 g |
| Large | ~136 g | ~121 | ~31 g | ~3.5 g | ~27 g |
| Extra large | ~152 g | ~135 | ~35 g | ~3.9 g | ~31 g |
Per 100 g the fruit is about 89 kcal and 23 g carbohydrate. That is the row to scale if you put the peeled banana on a kitchen scale.
If you count net carbs the Atkins way, a medium banana is about 24 g net. That can be an entire 25 g cap. It is still fruit, not a candy bar — and it is still most of a strict low-carb morning.
Key takeaway: Log the edible grams or a named size. “A banana” without a weight is how 90 kcal and 135 kcal get treated as the same snack.
Ripeness, cooking, and the things that are not the banana
Green bananas taste starchier. Yellow and spotted bananas taste sweeter because starch has converted toward sugar. For a daily log, that conversion is not a new food. Energy per gram stays close to the USDA raw row.
Baking or frying is a different story only because of what you add. A banana roasted with a teaspoon of butter and a teaspoon of brown sugar is no longer 105 kcal. Dried banana chips are a concentrated fruit: much less water, much more energy per handful.
Frozen banana in a blender is still a banana. Ice cream “nice cream” made from two large bananas is about 240 kcal of fruit before cocoa, peanut butter, or milk.
Protein powder, oats, and nut butter are not banana calories. They are the rest of the smoothie.
Key takeaway: Ripeness is a taste issue. Added fat and drying are the calorie issues.
Banana versus other snacks people swap it for
A banana is easy to carry. That is why it shows up next to yogurt, apples, and “I’ll just have toast” in the same snack slot.
| Snack | Typical portion | Approx. kcal | Carbohydrate | Protein |
|---|---|---|---|---|
| Medium banana | 118 g | 105 | 27 g | 1 g |
| Apple | 1 medium (~180 g) | ~95 | ~25 g | 0.5 g |
| Plain nonfat Greek yogurt | 170 g cup | ~100 | ~6 g | ~17 g |
| Slice of wheat bread | 1 slice (~40 g) | ~80 | ~14 g | ~4 g |
| 2 tbsp peanut butter | 32 g | ~190 | ~7 g | ~8 g |
The banana is not “high calorie” in the pizza sense. It is carbohydrate-dense for its size, and it is easy to eat two. Yogurt wins if the job was protein per meal. Banana wins if you needed carbs before a session and a fridge was not available.
If you are choosing banana versus yogurt — or banana versus a sweet potato side — run both foods through the food comparison tool. Look at protein per calorie and carb grams for the portion you actually eat, not a halo around the fruit.
Key takeaway: A banana is a 100-kcal carb snack. Pair it if you needed protein. Do not treat peanut butter as a free topping.
How people log bananas — and where the day goes wrong
A 72 kg lifter’s MyFitnessPal week often shows “banana” seven times and never shows a gram weight. Cronometer and MacroFactor will accept 118 g if you type it. Apple Health and Garmin will happily import whatever the tracker was told, including a 90 kcal small banana on a day you ate a 136 g large one.
The miss is rarely chemistry. It is portion theater.
| Before (what got logged) | After (what was eaten) | Why the day drifted |
|---|---|---|
| “1 banana” on the default medium row (105 kcal) | One supermarket large, ~136 g (121 kcal), twice a day | +32 kcal/day, boring but real over a month |
| “Banana smoothie” as one banana | Medium banana + 300 ml 2% milk + 2 tbsp peanut butter | ~105 vs ~440+ before oats or honey |
| Green banana logged as “low carb, 10 g” | Still ~23–27 g carbohydrate | The peel color is not a carb discount |
Weigh one peeled banana this week. Write the grams on a note in your tracker. Reuse that number until the bunch size changes.
Two medium bananas are about 210 kcal and 54 g carbohydrate. That can be a useful pre-long-run stack. It can also be breakfast plus a second unlogged fruit at the desk.
Key takeaway: Trackers do not know the fruit in your bag. They know the row you tapped. Match the row to the weight.
When one banana fits — and when it is three
On a moderate carb day from the carbohydrate calculator, one medium banana is a clean snack or a pre-workout. On a 1,800 kcal cut from the calorie calculator, it still fits. What crowds the day is the pattern around it.
Typical client-log patterns:
- Pre-workout, training day. One medium banana ~105 kcal, 15–45 minutes before lifting. Carbohydrate is doing a job. Protein still has to come from the next meal.
- Desk snack, repeat. Banana at 10 a.m. and another at 3 p.m. is 210 kcal if both are medium. Fine. Log both.
- Blender breakfast. The banana is the smallest line once oats and nut butter show up. See smoothie calories.
- “I was good, I only had fruit.” Four bananas is about 420 kcal and 108 g carbohydrate. That can be planned. It is not invisible.
Potassium is a reason people like bananas. A medium fruit is on the order of 400+ mg. That is useful and still not a reason to skip the calorie line.
This guide is educational food math, not medical advice. If you have a prescribed carb cap (diabetes meal plans, clinical keto), use the gram table with the person who set the cap.
Key takeaway: One banana is a snack. Three bananas, or one banana inside a nut-butter jar, is a meal. Name which one you ate.
A simple logging method
- Peel the banana. Weigh it, or pick small / medium / large from the table.
- In MyFitnessPal, Cronometer, or MacroFactor, enter grams or the USDA size that matches.
- If it went into a blender, add every other ingredient. Do not stop at the fruit.
- If you eat the same bunch all week, reuse the gram number.
You now have a number you can defend. The fruit did not become complicated. The log got honest.
When you want a second opinion on banana versus another snack you keep repeating, use the food comparison tool and compare the portions you actually buy — not a 100 g textbook row you never eat.
Key takeaway: Weigh one peeled banana, save the grams, and reuse that row. Compare snacks on the portion you buy, not on a 100 g textbook line.