Banana Carb and Sugar Calculator
Find how many carbs are in a banana by size, quantity and ripeness. Compare total and net carbs, sugar, fibre, calories and carb exchanges.
Result
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- Total carbohydrate
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- Sugar
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- Fibre
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- Net carbs
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- Calories
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- Carb exchanges
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Planning note. One carb exchange is 15 g of carbohydrate. This figure is a planning aid, not diabetes management advice.
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How many carbs are in a banana?
How many carbs are in a banana depends mainly on its edible weight. This calculator scales USDA FoodData Central's raw banana values per 100 g to the size and quantity you select.
Ripeness changes the sugar and starch split more than it changes total carbohydrate. As a banana ripens, resistant starch converts to simple sugars, but the exact split varies by fruit.
Net carbs means total carbohydrate minus fibre. It is not a regulated or FDA-recognised term; the US Nutrition Facts label reports total carbohydrate.
Nutrients = (banana weight in g ÷ 100) × USDA value per 100 g; net carbs = total carbs − fibre; exchanges = total carbs ÷ 15 The carb-exchange figure is a meal-planning aid used with a clinician or dietitian, not diabetes management advice. This tool does not tell anyone whether they should eat a banana.
Banana carb calculator FAQ
How many carbs are in a medium banana?
Using the supplied raw banana reference, a medium 118 g banana has about 26.9 g total carbohydrate, 14.4 g sugar, 3.1 g fibre and 23.8 g net carbs.
Does ripeness change banana carbs?
Ripeness mainly shifts the sugar and starch fractions. Total carbohydrate stays near constant, while starch generally converts to simple sugars as the fruit ripens; exact figures vary by banana.
What is the difference between total and net carbs?
Total carbohydrate includes fibre. Net carbs in this calculator are total carbohydrate minus fibre, but net carbs is not a regulated or FDA-recognised term.
What is a banana carb exchange?
This calculator uses one exchange as 15 g of carbohydrate, so a medium banana is about 1.8 exchanges. Use that figure only as a planning aid with a clinician or dietitian.
Are the nutrition values exact for every banana?
No. The results are estimates based on standard edible weights and USDA values for raw banana. Actual fruit varies in size, variety and composition.