Net Carbs Calculator
Net carbs are the carbohydrate left after taking away fibre and sugar alcohols, which the body doesn't fully digest. Enter the figures from a food label to see the net carbs per serving and for what you ate.
Net carbs
g
Enter the carbohydrate from the label
g per serving ×
Total carbs − fibre − sugar alcohols (common definition, not official)
Total carbs
g
What people with diabetes are advised to count (American Diabetes Association)
Living with diabetes? The American Diabetes Association does not recognise "net carbs" and recommends counting total carbohydrate, because some fibre and sugar alcohols are partly digested and still raise blood sugar.
Your results are attached to the form below
These figures are estimates for general awareness only and are not medical advice or a diagnosis. Read our Medical Disclaimer.
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How this is calculated
Net carbs = total carbohydrate − dietary fibre − sugar alcohols (polyols), the commonly used definition. It is not an official term: the American Diabetes Association does not recognise it. If a label's carbohydrate figure already excludes fibre — as on EU and UK labels, where carbohydrate means carbohydrate that is digested and fibre is listed separately (Regulation (EU) 1169/2011) — fibre is not subtracted again.
Read the label first
Labels show carbohydrate in different ways. On American labels, total carbohydrate includes fibre; on European and UK labels, it doesn't. Check whether fibre is listed underneath carbohydrate ("of which fibre") or as a separate line, and choose the matching option.
Diabetes and net carbs
The American Diabetes Association recommends counting total carbohydrate and checking your blood glucose, because some fibre and sugar alcohols are partly digested and still affect blood sugar. If you count carbs for insulin, follow the method your diabetes team has taught you.
Related calculators
Planning a low-carb diet? Use the Keto Calculator. For your overall daily carbohydrate range, see the Carb Calculator.
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