Net Carbs Calculator
Enter total carbohydrates, fibre, and sugar alcohols to determine net carbs. Adjust the sugar alcohol setting based on your tracking style (full, half, or none).
Net Carbohydrate Summary
Net carbs per serving
13.5 g
Net carbs (total recipe)
27 g
Subtractions applied
Fibre: 10 g - Sugar alcohol adjustment: 3 g
How to Use This Calculator
Gather nutrition information
Read labels or use a food database to collect total carbs, fibre, and sugar alcohols (if present) for the serving size.
Choose sugar alcohol treatment
Low-carb communities vary: keto plans often subtract all erythritol but only half of maltitol. Adjust based on your plan and tolerance.
Scale by servings
Enter the number of servings the recipe yields to see net carbs per portion. Useful for meal prep and baking.
Formula
Net carbs = Total carbs - Fibre - Sugar alcohol adjustment
Net carbs per serving = Net carbs / Servings
- Adjustment = Sugar alcohol x (1, 0.5, or 0) depending on tracking preference.
- Some sugar alcohols (erythritol) have negligible impact on glucose; others (maltitol) partially count.
- Always monitor personal blood glucose or ketone response to fine-tune adjustments.
Full Description
Net carbohydrate tracking subtracts fibre and selected sugar alcohols from total carbohydrates. This helps low-carb or ketogenic eaters focus on carbs that meaningfully affect blood glucose. Because sugar alcohol effects vary by type, the calculator lets you select how much to subtract.
Combine this tool with macro calculators to keep net carbs aligned with your daily targets. Monitor how different sugar alcohols affect you-some individuals find maltitol impacts blood sugar enough to count fully.
Frequently Asked Questions
Which sugar alcohols should be subtracted fully?
Erythritol, monk fruit blends, and stevia sugar alcohols typically have negligible impact, so many subtract them fully.
Why subtract only half the sugar alcohol?
Polyols like maltitol and sorbitol partially affect blood glucose. Counting half helps approximate their impact.
Do I subtract fibre from vegetables?
Yes. Net carb tracking removes fibre from total carbs regardless of food source, though whole-food fibre is encouraged.
How do I handle glycerin or allulose?
Treat them like sugar alcohols. Many people subtract 100 percent of allulose, but monitor your own response.