freeonlinecalFreeOnlineCal

Net Carb Calculator

Determine the total digestible carbs in your food item for keto or low-carb diets.

Enter the total carbohydrate content in grams as listed on the nutrition label.
Enter the dietary fiber content in grams. Fiber is typically subtracted from total carbs.
Enter the sugar alcohol content in grams (e.g., erythritol, xylitol). These are often partially subtracted.

Your estimated Net Carbs are:

0 g

Made with Minform

How to calculate Net carb calculator?

Net carbs estimate the digestible carbohydrates that affect blood glucose by removing non-digestible components from the total carbohydrate value.

Use the core formula: Net Carbs (g) = Total Carbs − Dietary Fiber − Effective Sugar Alcohols

Using the Net carb calculator calculator: an example

Example serving: 20 g total carbs, 5 g dietary fiber, and 6 g sugar alcohols.

Step-by-step calculation:

  • Start with Total Carbs: 20 g per serving.
  • Subtract Dietary Fiber: 20 − 5 = 15 g.
  • Subtract effective Sugar Alcohols (e.g., erythritol counted fully): 15 − 6 = 9 g.
  • Result: Net Carbs = 9 g per serving.

Frequently Asked Questions

Should I always subtract sugar alcohols?

It depends on the type: erythritol is commonly subtracted in full, while others (xylitol, maltitol) may be only partially subtracted; check ingredient specifics.

Do I subtract all fiber types?

Most dietary fiber listed on labels is non-digestible and is subtracted from total carbs, but when in doubt consult product details or nutrition guidance.

How do I handle different serving sizes?

Scale all values to the actual serving you consume (multiply or divide the label values) before applying the net carbs formula.


Related Calculators

Homemade pizza nutrition calculator