Net Carbs Calculator
Estimate net carbohydrates from total carbs, fiber, erythritol and other sugar alcohols with the subtraction assumptions visible.
Enter or adjust the values above, then calculate.
Net Carbs: fiber & Sugar Alcohol Adjustments
Estimate net carbohydrates from total carbs, fiber, erythritol and other sugar alcohols with the subtraction assumptions visible.
Inputs this tool uses
- Total carbohydrate
- Fiber
- Erythritol
- Other sugar alcohols
- Fraction of other sugar alcohols subtracted
What you get
Estimated net carbohydrate using the assumptions you selected.
How to use the Net Carbs Calculator
- Enter total carbohydrate, fiber, erythritol and the other fields relevant to this calculation.
- Select any method, activity level or option shown on this page, then choose Calculate.
- Read the main result together with the supporting values, method, assumptions and limitations below before using the estimate.
How this calculation works
Net-carbohydrate arithmetic subtracts fiber, erythritol and the selected fraction of other sugar alcohols; label rules vary by jurisdiction.
Example calculation
The sample values loaded into the calculator produce 32.0 g. This example exists to show how the output is structured; replace the sample values with your own inputs for your calculation.
Assumptions and limitations
- Energy and nutrient outputs are estimates or general reference values, not individualized treatment targets.
- Adult calorie-goal tools should not be used for children, pregnancy or medical nutrition therapy unless the page explicitly supports that life stage.
Sources and review status
Source set last verified 2026-09-25. No clinician review is claimed unless a real named reviewer is displayed.
Questions people ask about Net Carbs Calculator
Why do net-carb formulas differ between labels?
Fiber and sugar-alcohol treatment varies by product and jurisdiction. This calculator itemizes the subtraction assumptions instead of claiming one universal labeling rule.
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