How much sugar is in banana?
Banana has 14.4 g of sugar per 1 medium (118 g) — about 3.4 teaspoons. That's 12.2 g per 100 g, and it's all naturally occurring — whole banana has no added sugar.
USDA FoodData Central · raw · FDC 173944
Sugar by portion
| Portion | Sugar | ≈ teaspoons | Total carbs | Calories |
|---|---|---|---|---|
| 1 medium (118 g) | 14.4 g | 3.4 tsp | 26.9 g | 105 |
| 100 g | 12.2 g | 2.9 tsp | 22.8 g | 89 |
| 1 oz (28 g) | 3.5 g | 0.8 tsp | 6.5 g | 25 |
Teaspoon figure converts grams of sugar at ~4.2 g per level teaspoon, for scale only. This is the total sugar naturally present — whole banana carries no added sugar. Values from USDA per-100 g data (FDC 173944, SR Legacy). raw.
A medium banana has about 14.4 g of sugar — roughly 3.4 teaspoons — in a 118 g fruit, or 12.2 g per 100 g. That’s a moderate amount: more than an apple by total grams, less than a cup of grapes or cherries. It’s the number behind the occasional “bananas are full of sugar” worry, but the honest framing is that every gram is naturally occurring fruit sugar, with no added sugar in a plain banana — and it comes with one of the best potassium hits in the produce aisle.
Natural sugar, not added sugar
The 14.4 g in a banana isn’t the same as 14.4 g spooned from a sugar jar, because of everything else in the fruit. That sugar is packaged with about 3.1 g of fiber, plenty of water, vitamin B6, and a standout ~420 mg of potassium — the mineral that makes bananas the go-to for athletes and cramp prevention. Fiber and water slow how quickly the sugar lands, so whole fruit behaves differently from the added sugar in a candy bar or soda. Added sugar is the kind guidance tells you to cut back on; a plain banana simply has none. The place to stay alert is processed banana products — chips, sweetened banana bread, some smoothies — where real added sugar can pile on top of the fruit’s own.
Riper means sweeter — and the pre-workout angle
One quirk worth knowing: ripeness changes the sugar’s behavior. As a banana ripens, its starch converts to sugar, so a spotty-brown banana tastes much sweeter and digests faster than a firm, green-tipped one. That fast, convenient energy is exactly why the banana is the classic pre-workout fruit — quick carbohydrate plus potassium, with its own wrapper and zero prep. If you’re watching blood sugar or weight, a banana is still moderate and reasonable; many people simply pick a less-ripe one or pair it with protein or nut butter to slow things down. That’s everyday practice, not a warning. As always, this is general information rather than medical advice — a clinician or dietitian can tailor carb targets to you.
So treat the banana as what it is: a naturally sweet, potassium-rich energy fruit, best matched to a workout or paired with a protein. For the rest of the nutrition picture, see protein in banana — and for anything packaged, always read the label’s own sugar and added-sugar lines.
Frequently Asked Questions
How much sugar is in a banana?
About 14.4 g of sugar in one medium banana (118 g), which is 12.2 g per 100 g (USDA FDC 173944). That medium banana is roughly 105 calories and 26.9 g of total carbohydrate, with about 3.1 g of fiber and a standout ~420 mg of potassium.
How many teaspoons of sugar is that?
Roughly 3.4 teaspoons. We convert the 14.4 g of sugar in a medium banana at about 4.2 g per level teaspoon, just to make it easy to picture. It's a mental scale only — bananas grow with their sugar inside, so nothing was added.
Is the sugar in a banana natural or added?
All natural. A whole banana has zero added sugar — every gram is the fruit's own, packaged with fiber, water, potassium and vitamin B6. That's a different thing from the added sugar in cookies or soda, which is the kind dietary guidance tells you to limit. A plain banana has no added-sugar line at all.
Is a banana too much sugar if I'm watching blood sugar or weight?
A banana is moderate, not extreme — about 14.4 g of sugar with roughly 3.1 g of fiber to slow it down, plus a lot of potassium. Riper bananas taste sweeter and digest a little faster as starch turns to sugar, so portion and ripeness both matter. Many people managing blood sugar pair a banana with protein or nut butter, which is sensible everyday practice. This is general information, not medical advice — your clinician or dietitian can tailor it to you.
Does a riper banana have more sugar?
Effectively yes in how it behaves. As a banana ripens, its starch converts to sugar, so a spotty-brown banana tastes much sweeter and releases its sugars faster than a firm green-tipped one, even though the total carbohydrate is similar. If you want a gentler, slower banana, pick one that's just barely yellow.
When was this data last verified?
2026-06-04, against USDA FoodData Central FDC 173944 (Bananas, raw; SR Legacy). We re-verify reference pages periodically and update when the underlying USDA entry changes.
Whole-food values are USDA reference data, not a Labelgrade (that score is for branded packaged products, where we penalize added sugar). See our methodology and the added-sugar calculator.