How Many Calories And Protein Does A Banana Have? | Quick Facts Guide

Calories And Protein In Bananas: Quick Reference

Here’s the straight answer with context. The classic medium fruit lands near 105 calories with about 1.3 grams of protein. That’s from a 118-gram fruit, which is the length most shoppers picture. Smaller fruit dips under 100 calories; larger sizes creep up. Prep matters too. A heaping cup of slices or a thick mash packs more grams per spoonful than a handheld bite.

Why The Numbers Change

Bananas are mostly water and carbs, with a little protein. Weight rules the count. The denser the serving—like a packed cup—the higher the total. Ripeness shifts sugar and texture, but the calorie math stays close for raw fruit.

Macro Snapshot Per 100 Grams

Per 100 grams you get about 89 calories, ~23 grams of carbs, ~2.6 grams of fiber, ~12 grams of natural sugars, ~1.1 grams of protein, and a trace of fat. Most of the energy comes from starch and sugar. That balance is why this fruit feels steady for a morning snack or a pre-gym bite.

Size-By-Size Banana Calories And Protein

Use this table to match everyday servings. Values come from USDA-based references and round to friendly numbers for home use.

Serving	Calories	Protein (g)
Extra small (≤ 81 g)	~72	~0.9
Small (101 g)	~90	~1.1
Medium (118 g)	~105	~1.3
Large (136 g)	~121	~1.5
Extra large (152 g)	~135	~1.7
100 g (about half large)	89	1.1

Snack choices get easier once you’ve set your daily calorie needs. A medium fruit fits neatly into most plans without crowding lunch or dinner.

How A Banana’s Protein Fits Your Day

Protein isn’t the main reason people reach for this fruit, yet it still helps. That 1–2 gram range supports meals that already include eggs, dairy, yogurt, tofu, or lean meat. The payoff comes from the combo: steady carbs plus a touch of protein and fiber that keeps the bite satisfying.

Good Times To Eat One

• Pre-workout: Easy on the stomach with quick fuel.
• Post-workout: Pairs well with a protein shake for recovery.
• Mid-morning: Bridges the gap to lunch with minimal prep.

Micros You Also Get

This fruit brings potassium and vitamin B6, plus a modest hit of vitamin C. Potassium helps with fluid balance and muscle function. The NIH potassium fact sheet lays out daily targets. For general meal planning with fruit, USDA’s MyPlate fruit group encourages whole fruit over juice for more fiber.

Portion Control Tricks That Work

Pick the size that matches your goal. Need fewer calories? Choose a small one or split a large fruit. Building a snack? Add a tablespoon of peanut butter for staying power. Baking? Measure by cups, not pieces, so recipes turn out the same each time.

If you track macros, treat a small fruit as a light carb side and a medium fruit as a modest carb base. Pairing with 15–25 grams of protein steadies energy for longer blocks of work. During desk days, half a fruit with a handful of nuts keeps the snack tidy without a sugar crash.

Banana Calories By Prep Method

Once you slice or mash, density changes. Here’s a handy view for cooking, smoothies, and baking.

Prep/Measure	Calories	Protein (g)
1 cup slices (150 g)	~134	~1.6
1 cup mashed (225 g)	~200	~2.7
Half medium, sliced	~53	~0.6
Smoothie base* (1 medium)	~105	~1.3
Overnight oats add-in (½ medium)	~53	~0.6

*Totals rise with milk, yogurt, protein powder, nut butter, or sweeteners.

Method: How These Numbers Were Calculated

The serving weights match common market sizes. Per-100-gram values anchor the math. From there, calories and protein scale with the gram weight. Values are rounded to whole calories and one decimal place for protein, which mirrors what shoppers can track day to day. Lab values drift a little with season and variety, so tables show a small tilde (~) to flag reasonable ranges.

Banana In Smoothies: Common Add-Ins And New Totals

Blending one medium fruit with milk or yogurt turns a light snack into a full mini-meal. Mix and match based on your target.

• +1 cup low-fat milk: add ~102 calories and ~8 g protein.
• +3/4 cup plain Greek yogurt: add ~100–130 calories and ~14–18 g protein.
• +1 tbsp peanut butter: add ~94 calories and ~4 g protein.
• +1 scoop whey (25 g protein): add ~120 calories and ~25 g protein.

Blend with ice and a pinch of salt if you sweat a lot during training. For lower energy needs, use half a fruit and extra ice for volume.

Peel Weight And Edible Portion

Labels and databases list nutrient values for the edible portion. The peel isn’t eaten in typical recipes, so you don’t need to subtract its weight from these tables. If you weigh food at home, peel first to get the number that matters for tracking.

Shelf Life And Food Safety Pointers

Whole fruit keeps on the counter for a few days to a week depending on room temperature. Cold storage slows browning after it reaches your preferred stage. For longer storage, peel and freeze in a flat layer, then move the pieces to a bag. Use frozen pieces within a few months for the best texture.

Evidence And References In Plain Language

The calorie and protein figures in this guide reflect public datasets built and maintained by U.S. agencies and well-known compilers. The NIH resource above helps you place potassium in a daily plan, and MyPlate offers broader guidance for building balanced meals with fruit.

How It Stacks Up Against Other Common Snacks

A medium piece sits near a plain granola bar in calories, yet it brings more potassium and no added sugar. Compared with a small apple, calories are a bit higher, and sweetness hits faster because this fruit carries more sugar per bite. Compared with an orange, the peel time is shorter and the texture is creamier, which makes it easier to eat during a work break or between classes.

Simple Protein Boosts That Pair Well

To build a snack that lasts through a busy afternoon, pair the fruit with one of these quick options. You’ll lift protein without pushing calories too far.

• Two boiled eggs: ~140 calories, ~12 g protein.
• Three slices deli turkey: ~60 calories, ~9 g protein.
• Half cup low-fat cottage cheese: ~90 calories, ~12 g protein.
• String cheese: ~80 calories, ~7 g protein.
• Handful of almonds (15 g): ~87 calories, ~3 g protein.

Pick one add-on for a light snack, or two for a more complete mini-meal. Saltier pairings also replace sodium after sweaty workouts.

Blood Sugar Context In Plain Words

Bananas land in the moderate range for glycemic impact when eaten on their own. Pairing with protein or fat slows the rise. Slices on peanut butter toast or a side of Greek yogurt is an easy way to make the curve smoother. If you track your response with a meter or wearable, adjust the portion and pairing that gives you steady energy.

Buying, Ripening, And Reducing Waste

Buy a mix of colors if you shop weekly. Eat the yellow ones first and let the greener ones ripen for later in the week. If the bunch all turns spotty at once, peel and freeze coins for smoothies or baking. A freezer bag of coins makes pancakes more tender and cuts the added sugar you need.

Cooking Uses With Calorie Notes

Pan-seared coins with a touch of oil add a caramel edge to oatmeal; add about 40 calories per teaspoon of oil. Baked chips made from thin slices stay light if you use spray oil sparingly. Muffins gain moisture from mashed fruit, which lets you dial back added sugar by a tablespoon or two without losing sweetness. Each tablespoon of sugar trimmed saves 48 calories across the batch.

Travel, Lunchboxes, And Office Fridges

A peel protects the flesh, so it carries well in a backpack. Tuck it in a side pocket to avoid bruising. For lunchboxes, pre-slice and splash with lemon to slow browning, then chill in a small container.

Balanced Nutrition Takeaway

You now have calorie and protein numbers you can trust for several common servings. Use the size that fits your plan, pair it with a protein, and enjoy the fruit as part of a fiber-rich pattern. If you want a deeper dive on energy balance, skim our calories and weight loss guide next.