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Net Carbs Calculator

Enter the total carbs and fiber from a nutrition label to get net carbs per serving and for what you ate. CraveSmart counts carbs the same way.

By Frank Cashio · Last reviewed

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Net carbs

Per serving
15 g
Total carbohydrate
24 g
Dietary fiberSubtracted
9 g
For 1 serving
15 g

Net carbs never go below 0 g, even when a label lists more fiber than carbs.

What are net carbs?

Net carbs are total carbohydrate minus dietary fiber. Your body does not digest most fiber the way it digests starch and sugar, so low-carb plans usually leave it out.

Net carbs = total carbohydrate − dietary fiber

Example: a serving of food whose label lists 24 g total carbohydrate and 9 g dietary fiber has 15 g net carbs.

The FDA does not define net carbs, so U.S. labels list total carbohydrate and fiber and leave the subtraction to you.

Some apps also subtract sugar alcohols. CraveSmart does not, because how much of them your body absorbs depends on the type, so this calculator does not either.

Sources

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Estimates only, not medical advice.