How many carbs are in natto?
1 cup of natto contains about 22.3g of carbohydrate, 12.8g net carbs after subtracting 9.5g of fiber, 34.1g of protein, and 371 calories.
Carbs by portion size
| Portion | Total carbs | Fiber | Net carbs |
|---|---|---|---|
| 1 cup (176g) | 22.3g | 9.5g | 12.8g |
| 100 grams (100g) | 12.7g | 5.4g | 7.3g |
Net carbs in natto
1 cup of natto contains 12.8g of net carbs — total carbs (22.3g) minus dietary fiber (9.5g). Net carbs are the carbs your body actually digests and that raise blood glucose. See our guide to net carbs for how this calculation works and when to use it.
Full nutrition for natto (per 100g)
- Calories: 211 kcal
- Carbohydrate: 12.7g
- Dietary fiber: 5.4g
- Sugars: 4.9g
- Protein: 19.4g
- Fat: 11g
Reference values from USDA FoodData Central (survey fndds dataset, fdcId 2342915). Values are per 100 grams.
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Download on the App StoreFrequently asked questions
How many carbs are in natto?
1 cup of natto contains about 22.3g of total carbohydrate. After subtracting 9.5g of fiber, the net carbs are about 12.8g.
How many net carbs are in natto?
Net carbs in 1 cup of natto are about 12.8g — that is total carbs (22.3g) minus dietary fiber (9.5g). See our net carbs explainer for the full calculation.
Is natto good for diabetics?
Natto contains carbohydrates that will raise blood glucose. Whether it fits your meal plan depends on the portion and your overall daily target. Most U.S. diabetes care teams use total carbs (not net) for insulin dosing — see our diabetes carb-counting guide.
Is natto keto-friendly?
Whether natto fits a keto plan depends on your daily net-carb budget (typically under 20–30g per day). One serving (1 cup) provides about 12.8g of net carbs.