Food label

Net carbs show up on low-carb food packages and in many diet apps. The idea is simple: not every gram of carbohydrate affects your body the same way. Fiber, for example, mostly passes through without being absorbed as sugar. Counting net carbs can help if you follow a lower-carb plan but still want enough fuel for your workouts.

What Net Carbs Are

Net carbs are the carbs your body digests and uses for energy. You find them by starting with total carbohydrates and subtracting fiber, and sometimes certain sugar alcohols. Our net carbs calculator does this math for you from any food label.

How to Calculate Net Carbs

  1. Find total carbohydrates on the nutrition label.
  2. Subtract dietary fiber.
  3. If the food has sugar alcohols, subtract erythritol fully and about half of most others, such as maltitol.
  4. The result is net carbs per serving.

Example: a bar with 22 grams total carbs, 9 grams fiber and 6 grams erythritol has about 7 grams net carbs.

Net Carbs in Common Foods

Food Serving Total Carbs Fiber Net Carbs
Oats, dry Half cup 27 g 4 g 23 g
Banana 1 medium 27 g 3 g 24 g
Raspberries 1 cup 15 g 8 g 7 g
Black beans, cooked Half cup 20 g 8 g 12 g
Avocado Half 9 g 7 g 2 g
White rice, cooked 1 cup 45 g 1 g 44 g

Values are approximate and vary by brand and portion.

How Many Carbs on Training Days?

There is no single right number. Many people on lower-carb plans eat more carbs on hard training days and fewer on rest days. Strength sessions and high-intensity intervals rely heavily on stored carbs, so very low intake can make those workouts feel flat. A common approach is placing most of the day’s carbs in the meals before and after training. Our guide on carbs before cardio covers timing in more detail.

When Total Carbs Make More Sense

If you are not following a low-carb diet, counting total carbs is simpler and works fine. Net carb claims on packaged foods are not always regulated the same way as other label numbers, so read the full label. For overall calorie needs, start with the TDEE calculator, then fit carbs within your total.

Tips for Counting Without Stress

  • Track for a week or two to learn your usual foods, then estimate.
  • Favor high-fiber carbs like berries, beans, oats and vegetables.
  • Do not cut carbs so low that workouts suffer.
  • Pair carbs with protein, as in our high-protein snack ideas.

Final Thoughts

Net carbs are total carbs minus fiber and some sugar alcohols. Counting them helps on lower-carb plans while still leaving room for workout fuel, especially around hard sessions. Use the calculator for labels, favor high-fiber foods and adjust intake by training day. Explore more tools in our fitness calculators.

FAQs

Are net carbs better to count than total carbs?

Only if you follow a low-carb plan. Otherwise, total carbs work fine.

Do all sugar alcohols count as zero?

No. Erythritol has very little effect, but others like maltitol count partly.

Should I eat more carbs on lifting days?

Many people feel and perform better that way. Rest days can be lower.