Carbs in Banana
How many carbs are in banana?
Banana has 20.2g net carbs per 100g — 22.8g total carbs minus 2.6g fiber — plus 1.1g protein, 0.3g fat, and 89 calories. 1 medium banana (118g) works out to about 23.8g net carbs and 105 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 per 100 g, sourced from USDA FoodData Central; net carbs are computed by CarbMeNot.
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Last updated June 10, 2026 · Reviewed by Jordan Lee, Nutrition Editor
Values per 100 g.
Is banana keto-friendly?
Banana is generally not keto-friendly. It has 20.2g net carbs per 100g (22.8g total carbs − 2.6g fiber). A typical serving — 1 medium banana (118g) — is about 23.8g 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.
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 has 89 calories per 100g. 1 medium banana (118g) has about 105 calories. That's alongside 1.1g protein, 0.3g fat, and 20.2g net carbs per 100g.
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 has 22.8g of total carbs and 20.2g of net carbs per 100 grams.
- How many net carbs are in banana?
- Banana has 20.2g of net carbs per 100 grams (total carbs 22.8g minus 2.6g fiber).
- Is banana keto-friendly?
- Banana is generally not keto-friendly. It has 20.2g net carbs per 100g (22.8g total carbs − 2.6g fiber). A typical serving — 1 medium banana (118g) — is about 23.8g 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 has 89 calories per 100 grams.
- How many carbs are in 1 medium banana?
- 1 medium banana (118g) has about 23.8g net carbs, 26.9g total carbs, and 105 calories.
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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.