Total carbs listed on nutrition label
grams (g)
Indigestible carbs to subtract
grams (g)
e.g., Erythritol, Xylitol
grams (g)
Ready to calculate
Enter the total carbohydrates and fiber from your food's nutrition label to calculate the net carbs.
Calculation Principles & Formulas
Net carbs refer to the digestible carbohydrates in food that are absorbed by the body and impact blood sugar levels. The calculation is based on subtracting indigestible components from total carbs:
[Basic Formula]
Net Carbs = Total Carbohydrates - Dietary Fiber
[Formula with Sugar Alcohols]
Net Carbs = Total Carbohydrates - Dietary Fiber - (Sugar Alcohols × 0.5)
Note: Dietary fiber is fully subtracted because it cannot be digested by the human body. Regarding Sugar Alcohols: Since different sugar alcohols impact blood sugar differently (e.g., Erythritol has almost no impact, while Maltitol does), standard safety practice is to subtract only half of the total sugar alcohol grams.
