Net Carbs vs Total Carbs: What Active People Should Track

If you have ever followed a low-carb or keto plan, you have seen the term net carbs. Nutrition labels in the United States, however, list total carbohydrates. The two numbers can be very different for foods high in fiber, which leaves many people unsure about which one to count.

Here is how each number works and how to choose the right one for your goals and training.

What Total Carbs Include

Total carbohydrates on a label include everything: starches, sugars, fiber and sugar alcohols. It is the full amount of carbohydrate in a serving, whether or not your body absorbs all of it. For people who simply want to eat a balanced diet, total carbs are easy to read and require no extra math.

What Net Carbs Mean

Net carbs try to show only the carbohydrates that affect blood sugar. The usual formula is total carbs minus fiber, and sometimes minus part or all of the sugar alcohols. Fiber passes through your digestive system mostly undigested, so it has little effect on blood sugar. That is why vegetables, nuts and seeds have far fewer net carbs than their totals suggest.

Keep in mind that net carbs are not an official label term regulated in the U.S. Different brands calculate them in different ways, so packaged foods that advertise low net carbs deserve a closer look at the label.

Examples Side by Side

You can run any food through our net carbs calculator to see the difference quickly.

Which Number Should Active People Track?

It depends on your goal:

• Following a keto or strict low-carb plan: net carbs are the standard, since they let you eat plenty of vegetables while staying under a daily limit.
• Training hard for strength or endurance: total carbs often matter more, because your muscles need enough carbohydrate to fuel and refill energy stores.
• Managing blood sugar: work with a healthcare provider, who may prefer one method over the other.
• Just eating well: you may not need to count carbs at all if your meals are built around whole foods.

Carbs and Your Workouts

Low-carb eating can work for general fitness, but many people notice weaker performance in hard cardio, high-rep lifting and interval training when carbs are very low. If your sessions feel flat, try placing more of your daily carbs around your workouts. Our article on how many carbs you need before a cardio workout covers the timing in more detail.

Final Thoughts

Total carbs show everything in a food. Net carbs subtract fiber to estimate what affects blood sugar. Count net carbs if you follow a low-carb plan, and keep an eye on total carbs if you train hard and need fuel. Either way, foods rich in fiber are a win. Explore more tools in our fitness calculators.

FAQs

How do you calculate net carbs?

Subtract fiber from total carbs. Some methods also subtract part or all of the sugar alcohols.

Is fiber counted in total carbs?

Yes. U.S. labels include fiber in total carbohydrates, then list it again on its own line.

Are net carbs regulated on food labels?

No, not in the U.S. Brands calculate net carbs in their own ways, so check the full label.

Can I build muscle on a low-carb diet?

Yes, with enough protein and calories. Some people find hard workouts feel better with more carbs, so adjust based on how you perform.