One medium banana (118 g) has about 1.3 g of protein; per 100 g of banana you get roughly 1.1 g.
As fruit goes, bananas land on the carb-forward side, but they still contribute a small bump of protein that can round out breakfast, a pre-workout snack, or a smoothie. Below you’ll find exact protein numbers by size and prep, how that compares with common foods, and practical ways to pair bananas so your meal hits sensible protein targets without turning into a heavy lift.
How Much Protein In A Banana? By Size And Prep
The figures below come from nutrient data mapped to typical market sizes and kitchen measures. Per-100-gram protein sits near 1.1 g, so bigger bananas or larger portions add small, steady increments. Values are rounded to one decimal place for readability.
| Banana Portion | Weight | Protein (g) |
|---|---|---|
| Per 100 g | 100 g | 1.1 |
| Extra Small (under 6 in) | 81 g | 0.9 |
| Small (6–7 in) | 101 g | 1.1 |
| Medium (7–8 in) | 118 g | 1.3 |
| Large (8–9 in) | 136 g | 1.5 |
| Extra Large (9+ in) | 152 g | 1.7 |
| 1 Cup, Sliced | 150 g | 1.6 |
| 1 Cup, Mashed | 225 g | 2.5 |
These weights match common retail sizes and kitchen measures, and the protein totals align with the per-100-gram baseline. For a quick mental check: every ~90–100 g of banana adds roughly 1 g of protein. If your question is How Much Protein In A Banana? the short on-plate answer is “about one to one-and-a-half grams,” depending on size.
Banana Protein By Size And Ripeness
Ripeness mainly shifts the carb profile (resistant starch falls as sugars rise) while protein stays flat across the ripening window you’d normally eat. That means a speckled banana won’t suddenly add protein; the bump you see comes from weight, not ripeness. Lab datasets tracking retail bananas at different stages show carbs changing with maturity while protein remains near the same small fraction per 100 g.
How Much Protein In A Banana? Compared With Other Foods
Fruit rarely delivers much protein, and bananas follow that pattern. Here’s a simple side-by-side so you can gauge the gap and plan smart pairings.
- Greek yogurt (170 g): ~15–18 g protein.
- Two eggs (100 g): ~12–13 g protein.
- Peanut butter (2 Tbsp / 32 g): ~7–8 g protein.
- Cooked lentils (½ cup / 100 g): ~4–5 g protein.
- Banana, medium: ~1.3 g protein.
That doesn’t make bananas a poor choice; it just means you’ll want a protein partner. Think yogurt with sliced banana, a cottage-cheese bowl with coins of banana and cinnamon, or a smoothie that blends banana with milk and a scoop of oats or a measured portion of protein powder.
Protein Targets: What You Actually Need
Daily protein needs are tied to body weight. A widely used baseline for healthy adults lands at 0.8 g per kilogram of body weight per day. Athletes, older adults, and people in energy deficits tend to aim higher, but 0.8 g/kg is the plain baseline many readers want for everyday planning.
To put that into breakfast math: if you weigh 70 kg, a baseline day lands at ~56 g of protein. A banana contributes a sliver of that total, so the practical move is pairing it with a protein-dense food.
Authoritative references for these points: the federal nutrient database (USDA FoodData Central) for banana composition, and peer-reviewed reviews that summarize adult protein recommendations near 0.8 g/kg (see an overview via NIH PubMed).
Smart Ways To Get More Protein With A Banana
Pair It With Dairy Or Soy
Layer sliced banana over Greek yogurt, kefir, or soy yogurt. You keep the flavor and potassium while lifting protein ten-to-fifteen fold compared with the fruit alone.
Go Nutty, But Measure
Peanut, almond, or cashew butter adds a quick protein and fat boost. Spoon, don’t pour. A leveled tablespoon goes a long way on toast with banana slices.
Blend A Real Meal Smoothie
Use milk or soy milk, add a banana, toss in oats, and include a measured scoop of protein powder if that fits your plan. You’ll sip 20–30 g of protein with solid carbs and fiber rather than drinking sugar alone.
Build A Balanced Bowl
Cottage cheese with banana coins, chia, and a small handful of walnuts hits protein, fiber, and texture with zero fuss.
Method Notes: Where The Numbers Come From
Per-100-gram values trace back to USDA data widely republished in nutrition tools. A typical medium banana weighs 118 g, which lines up with the serving selector used by food composition calculators based on USDA entries. Multiply the 1.1 g per 100 g baseline by the weight on your scale to estimate protein for the exact banana in your hand, and round to one decimal place to keep labels tidy.
Frequently Mixed-Up Points
Do Green Bananas Have More Protein?
No. Green bananas differ in starch and sugar, not protein. Protein stays near 1.1 g per 100 g across ripeness for edible stages.
Does The Peel Matter?
People don’t usually eat peels. Research on peel flour shows different composition from the pulp, but that doesn’t change the practical protein you get when eating the fruit.
Quick Portion Guide You Can Use
Use this compact cheat sheet to plan meals. It shows how a banana fits into realistic protein targets and how many bananas it would take to hit 20 g of protein on fruit alone (not a suggestion, just a scale marker). Pair, don’t pile.
| Body Weight | Baseline Protein (0.8 g/kg) | Bananas For ~20 g Protein |
|---|---|---|
| 50 kg | 40 g/day | ~15 medium bananas |
| 60 kg | 48 g/day | ~15 medium bananas |
| 70 kg | 56 g/day | ~15–16 medium bananas |
| 80 kg | 64 g/day | ~16 medium bananas |
| 90 kg | 72 g/day | ~16–17 medium bananas |
| 100 kg | 80 g/day | ~17 medium bananas |
This table isn’t a meal plan; it shows why pairings matter. A single medium banana brings ~1.3 g of protein, which is modest against daily targets. Match it with a protein-dense partner and the math works out fast.
Real-World Combos That Hit The Mark
Banana Toast With Measured Peanut Butter
One slice whole-grain toast, one tablespoon peanut butter, sliced banana, a pinch of salt. You’ll land near 7–9 g of protein plus fiber and potassium.
Yogurt Bowl With Banana And Seeds
Plain Greek or soy yogurt, half a banana sliced, chia or pumpkin seeds. Protein jumps while sugars stay reasonable.
Oat-Banana Shake
Milk or soy milk, banana, rolled oats, whey or soy protein, ice. Smooth, filling, and easy to repeat on busy mornings.
Label Literacy For Banana Protein
Fruit labels often round to whole grams and may show 1 g for a medium banana. That’s fine. The precise lab value sits closer to 1.29 g for a 118 g fruit and ~1.09 g per 100 g. If your article or menu needs a single number, “about 1.3 g per medium banana” tracks well with the underlying dataset.
Bottom Line: What To Do With This
Use bananas for quick energy, potassium, and vitamin B6, and let another item carry the protein. If your main question is still How Much Protein In A Banana? the practical take is this: treat the banana as a tasty add-on and lean on yogurt, eggs, soy, beans, or nuts to close the gap.