Net Carbs Calculator
The carbs that actually count on keto
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Net carbs are the carbohydrates your body digests into glucose — total carbohydrates minus fiber and (by the common convention) half of any sugar alcohols. On keto and low-carb diets people track net carbs rather than total carbs because fiber and most sugar alcohols have little impact on blood sugar. Enter the values from a nutrition label to get both the standard net carbs and the simpler fiber-only figure used in some countries.
Net carbs estimate the carbohydrates that actually raise blood sugar. The common low-carb method subtracts all fiber and half of sugar alcohols from total carbs. Fiber and most sugar alcohols are poorly absorbed, so they have little effect on blood glucose.
Frequently Asked Questions
- What are net carbs?
- Net carbs are an estimate used in some low-carbohydrate eating plans. This calculator subtracts fibre and half the sugar alcohols from total carbohydrate. It also shows a fibre-only result. These are calculation conventions, not a measurement of your individual blood-glucose response.
- How do I calculate net carbs?
- Enter total carbohydrate, fibre and optional sugar alcohols in grams. This tool calculates net carbs as total carbohydrate minus fibre minus half the sugar alcohols, with a minimum of zero. It also shows total carbohydrate minus fibre for comparison.
- Why do net carbs matter for keto?
- Some low-carbohydrate plans track net carbs to distinguish fibre from other carbohydrates. Definitions and food labelling conventions differ, and sugar alcohols are not all absorbed alike. Check how your food label reports fibre before using this estimate.