How many carbs are in zwieback?
1 piece of zwieback contains about 5.2g of carbohydrate, 5g net carbs after subtracting 0.2g of fiber, 0.7g of protein, and 30 calories.
Carbs by portion size
| Portion | Total carbs | Fiber | Net carbs |
|---|---|---|---|
| 1 piece (7g) | 5.2g | 0.2g | 5g |
| 1 toast, Gerber Zwieback (7g) | 5.2g | 0.2g | 5g |
| 1 rusk (10g) | 7.4g | 0.3g | 7.2g |
| 1 oz (28.4g) | 21.1g | 0.7g | 20.4g |
| 100 grams (100g) | 74.2g | 2.5g | 71.7g |
Net carbs in zwieback
1 piece of zwieback contains 5g of net carbs — total carbs (5.2g) minus dietary fiber (0.2g). 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 zwieback (per 100g)
- Calories: 426 kcal
- Carbohydrate: 74.2g
- Dietary fiber: 2.5g
- Sugars: 12.5g
- Protein: 10.1g
- Fat: 9.7g
Reference values from USDA FoodData Central (sr legacy dataset, fdcId 171372). Values are per 100 grams.
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Download on the App StoreFrequently asked questions
How many carbs are in zwieback?
1 piece of zwieback contains about 5.2g of total carbohydrate. After subtracting 0.2g of fiber, the net carbs are about 5g.
How many net carbs are in zwieback?
Net carbs in 1 piece of zwieback are about 5g — that is total carbs (5.2g) minus dietary fiber (0.2g). See our net carbs explainer for the full calculation.
Is zwieback good for diabetics?
Zwieback 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 zwieback keto-friendly?
Whether zwieback fits a keto plan depends on your daily net-carb budget (typically under 20–30g per day). One serving (1 piece) provides about 5g of net carbs.