Banana Calories & Carbs
Last updated September 8, 2026 · Compiled by the CarbMeNot Team
Values per 1 medium banana (118g); per 100 g: 20.2g net carbs, 89 cal. Net carbs = total carbs − fiber − sugar alcohols — do the math for any label with the free net carbs calculator.
How many carbs are in banana?
Banana — 1 medium banana (118g) — has 23.8g net carbs: 26.9g total carbs minus 3.1g fiber, plus 1.3g protein, 0.4g fat, and 105 calories. Per 100g that is 20.2g net carbs (22.8g total carbs, 2.6g fiber) and 89 calories. That makes banana high in net carbs and about average for the typical fruit, which averages about 17.3g net carbs per 100g. At this carb count, banana is best limited to small portions on keto (usually 20–50g net carbs per day). Values are per 100 g, sourced from USDA FoodData Central; net carbs are computed by CarbMeNot.
Is banana keto-friendly?
Banana is generally not keto-friendly. 1 medium banana (118g) is 23.8g net carbs (26.9g total carbs − 3.1g fiber); per 100g that is 20.2g net carbs. On a standard keto diet (20–50g net carbs per day), even one serving uses a large share of your daily carbs, so keep portions small or save it for a higher-carb day.
Keeping an eye on carbs in banana?
Banana runs higher in carbs, so portions matter. CarbMeNot tracks every gram from a photo, so you stay under your daily limit without the math.
Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| 1 medium banana | 23.8g | 26.9g | 1.3g | 105 |
| 100 g (3.5 oz) | 20.2g | 22.8g | 1.1g | 89 |
| 1 oz (28 g) | 5.7g | 6.4g | 0.3g | 25 |
How many calories are in banana?
Banana — 1 medium banana (118g) — has 105 calories, with 1.3g protein, 0.4g fat, and 23.8g net carbs. Per 100g: 89 calories and 20.2g net carbs.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 89 |
| Total carbs | 22.8g |
| Net carbs | 20.2g |
| Fiber | 2.6g |
| Sugar | 12.2g |
| Sugar alcohols | 0g |
| Protein | 1.1g |
| Fat | 0.3g |
| Sodium | 1mg |
| Potassium | 358mg |
Source: USDA FoodData Central (Foundation). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in banana?
- Banana (1 medium banana, 118g) has 26.9g of total carbs and 23.8g of net carbs. Per 100 grams: 22.8g total, 20.2g net.
- How many net carbs are in banana?
- Banana has 23.8g of net carbs per 1 medium banana (118g) — 26.9g total carbs minus 3.1g fiber.
- Is banana keto-friendly?
- Banana is generally not keto-friendly. 1 medium banana (118g) is 23.8g net carbs (26.9g total carbs − 3.1g fiber); per 100g that is 20.2g net carbs. On a standard keto diet (20–50g net carbs per day), even one serving uses a large share of your daily carbs, so keep portions small or save it for a higher-carb day.
- How many calories are in banana?
- Banana (1 medium banana, 118g) has 105 calories; that is 89 calories per 100 grams.
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CarbMeNot provides general nutrition information, not medical advice. Values are estimates — verify before relying on them for any health decision. See our Medical Disclaimer.