Check the nutrition label for total carbohydrates
Subtract dietary fiber from total carbohydrates
Subtract sugar alcohols if they are listed and if applicable
Subtract allulose if listed, if applicable
Net carbs = total carbs – fiber – certain sugar alcohols – allulose
Use the serving size on the label for the calculation
Multiply the net carbs by the number of servings you eat
For foods without labels, estimate net carbs from ingredient amounts or a reliable database