How to Calculate Net Carbs for Weight Loss


Reviewed by Dr. Drew Sutton, MD
How to Calculate Net Carbs

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When it comes to losing weight, there are countless approaches you can take. One popular strategy is to track your carbohydrate intake, but it’s essential to understand that not all carbs are created equal. That’s where net carbs come in. By removing the fiber and sugar alcohols from a food’s total amount of carbohydrates, you can calculate its net carb value and better manage your blood sugar levels. This article will explore net carbs and why they matter for weight loss.

What Are Net Carbs?

Net carbs are the total amount of carbohydrates in a food item minus the fiber and sugar alcohols. Fiber is a carbohydrate that the body can’t fully digest, so it doesn’t contribute to blood sugar levels like other carbs. Sugar alcohols, on the other hand, have an insignificant influence on blood sugar levels and are often used as sweeteners in low-carb or keto foods. You can better manage your blood sugar levels and potentially lose weight by tracking net carbs instead of total carbs.

Why Calculate Net Carbs?

Calculating net carbs can be a helpful tool for weight loss and blood sugar management. By focusing on net carbs instead of total carbs, you can ensure that you consume primarily nutrient-dense foods that will support your health and well-being. Additionally, net carbs can help you avoid blood sugar spikes and crashes, leading to cravings and overeating. Incorporating low-carb or keto-friendly foods into your diet can reduce your net carb intake and support your weight loss goals.

How to Calculate Net Carbs

How to Calculate Net Carbs

Now that we’ve covered the basics of net carbs let’s dive into how to calculate them. The process is simple – subtract the amount of fiber and sugar alcohols from the total number of carbohydrates in a food. For example, if a food has 20 grams of carbohydrates, 5 grams of fiber, and 2 grams of sugar alcohol, the net carb value would be 13 grams (20 – 5 – 2 = 13).

Fiber Carbs

A crucial ingredient that promotes digestive health and keeps you feeling full for longer is fiber. It’s critical to subtract the amount of fiber from the total amount of carbohydrates to accurately measure net carbohydrates. High-fiber foods like vegetables, nuts, and seeds are great options for reducing net carb intake while getting essential nutrients.

Sugar Alcohols Carbs

Sugar alcohol is a carbohydrate often used as a sweetener in low-carb or keto-friendly foods. While they have a minimal impact on blood sugar levels, they still contribute to the total carb count. When calculating net carbs, it’s important to subtract the amount of sugar and alcohol from the total carbs to get an accurate measurement.

How to Read Food Labels to Calculate Net Carbs:

Reading food labels is essential for anyone who wants to track their net carb intake. To calculate net carbs, you’ll need to look at the total carbohydrate content and the amount of fiber and sugar alcohols. By subtracting the fiber and sugar alcohol content from the total carbs, you can determine the net carb count of a food.

Net Carbs vs. Total Carbs: What’s the Difference?

While net and total carbs are essential when following a low-carb or ketogenic diet, they have different health implications. The term “total carbs” describes all the carbohydrates in a food. When determining net carbs, the quantity of fiber and sugar alcohols—which have little impact on blood sugar levels—is considered. As a more precise gauge of the carbohydrates that impact the body, net carbs are frequently used.

Can a Very Low Carb Diet Help You Lose Weight?

Following a very low-carb diet, such as the ketogenic diet, can effectively support weight loss. The body enters a state of ketosis by significantly lowering its carbohydrate intake, which causes it to start using fat as fuel instead of carbohydrates. However, it’s important to note that a very low-carb diet may not suit everyone and should be cautiously approached. It’s always best to consult a healthcare professional before making significant dietary changes.

Tracking Net Carbs for Weight Loss

How to Calculate Net Carbs

Tracking net carbs can be a powerful tool for weight loss. By focusing on the net carb content of foods, you can make more informed choices about what to eat and avoid, which can help you achieve your weight loss goals. Additionally, tracking net carbs can help you stay on track with a low-carb or ketogenic diet, which is effective for weight loss in many people.

  • Common Mistakes to Avoid When Calculating Net Carbs

When calculating net carbs, people often make a few common mistakes. These include failing to account for fiber and sugar alcohols, using inaccurate food labels, and overlooking hidden sources of carbs in foods. To avoid these mistakes, it’s essential to carefully read food labels, double-check your calculations, and be aware of the origins of hidden carbs in foods.

  • Tips for Add More Low-Net Carb Foods into Your Diet

Incorporating more low-net-carb foods into your diet can significantly reduce your carb intake and support weight loss. Some tips include focusing on whole, unprocessed foods, choosing low-carb alternatives to high-carb foods, and experimenting with new low-carb recipes. Additionally, making small changes over time can be an effective way to transition to a lower-carb diet without feeling overwhelmed.

Net Carbs and Blood Sugar Control

Tracking net carbs can effectively control blood sugar levels, especially for people with diabetes or insulin resistance. By reducing carb intake, the body is less likely to experience blood sugar spikes and crashes, which can lead to various adverse health outcomes. Additionally, tracking net carbs can help you make more informed choices about which foods to eat and avoid to support blood sugar control.

  • Does Net Carb Counting Work for Everyone?

While net carb counting can be effective for weight loss and blood sugar control, there are better approaches for everyone. Factors like individual metabolism, dietary preferences, and health conditions can all impact the effectiveness of net carb counting. Additionally, it’s essential to approach any nutritional changes with a balanced, individualized approach that considers your unique needs and goals.

  • Net Carb Counting for Specific Diets

Net carb counting is a popular approach to dietary management for various diets, including the paleo diet, the Atkins diet, and more. By tracking net carbs, followers of these diets can make more informed choices about what to eat and avoid to support their health goals. However, it’s important to note that the specific guidelines for net carb counting may vary depending on the diet.


In conclusion, people who want to reduce their weight or control their blood sugar levels can benefit from knowing how to calculate net carbohydrates. By subtracting fiber and sugar alcohol carbs from total carbs, you can better understand food’s impact on your body. However, it’s crucial to remember that net carbohydrates aren’t the only thing to consider when choosing foods. Other factors like calorie count, nutrient content, and individual health goals should also be considered.

Frequently Asked Questions

What are net carbs?

Net carbs are the total amount of carbohydrates in a food item minus the fiber and sugar alcohols. These are the carbohydrates that are digested and absorbed by the body.

Why should I calculate net carbs?

Calculating net carbs can be helpful for weight loss and managing blood sugar levels. It allows you to make more informed choices about what foods to eat.

Can I eat unlimited net carbs on a low-carb diet?

No, even on a low-carb diet, you should still pay attention to portion sizes and calorie intake. While net carbs are important, they aren’t the only factor to consider.

What are fiber carbs?

Fiber carbs are the indigestible portion of carbohydrates found in plant foods like fruits, vegetables, and whole grains. They are important for maintaining digestive health and can help you feel fuller for longer.

What are sugar alcohols carbs?

Sugar alcohols are a type of carbohydrate that are often used as a sugar substitute in processed foods. They are digested differently than regular sugar and have fewer calories.

Are sugar alcohols safe to consume?

In moderation, sugar alcohols are generally safe to consume. However, consuming large amounts can cause digestive issues like bloating and diarrhea.

How many net carbs should I aim for in a day?

The number of net carbs you should aim for in a day depends on your individual health goals and needs. Consult with a dietitian or healthcare provider for personalized recommendations.

Is a very low-carb diet suitable for everyone?

A very low-carb diet may not be suitable for everyone, especially those with certain medical conditions like diabetes or kidney disease. It’s important to consult with a healthcare provider before making significant changes to your diet

+ 11 Sources

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  1. Oh R, Gilani B, Uppaluri KR. Low Carbohydrate Diet. PubMed. Published 2023. Accessed May 16, 2023.
  2. CDC. Fiber Foods. Centers for Disease Control and Prevention. Published June 20, 2022. Accessed May 16, 2023.
  3. Sugar Alcohols What They Are. Accessed May 16, 2023.
  4. Goyal R, Deshmukh N. Food label reading: Read before you eat. Journal of Education and Health Promotion. 2018;7(1):56. doi:
  5. van Baak MA. Dietary carbohydrates and weight loss maintenance. Current Opinion in Clinical Nutrition & Metabolic Care. 2021;24(4):354-358. doi:
  6. Russell WR, Baka A, Björck I, et al. Impact of Diet Composition on Blood Glucose Regulation. Critical Reviews in Food Science and Nutrition. 2013;56(4):541-590. doi:
  7. Wolever TMS. Carbohydrate and the Regulation of Blood Glucose and Metabolism. Nutrition Reviews. 2003;61(suppl_5):S40-S48. doi:
  8. Pais V, Patel BP, Ghayoori S, Hamilton JK. “Counting Carbs to Be in Charge”: A Comparison of an Internet-Based Education Module With In-Class Education in Adolescents With Type 1 Diabetes. Clinical Diabetes. 2020;39(1):80-87. doi:
  9. CDC. Diabetes and Carbohydrates . Centers for Disease Control and Prevention. Published 2019.
  10. Chawla S, Tessarolo Silva F, Amaral Medeiros S, Mekary RA, Radenkovic D. The Effect of Low-Fat and Low-Carbohydrate Diets on Weight Loss and Lipid Levels: A Systematic Review and Meta-Analysis. Nutrients. 2020;12(12):3774. doi:
  11. Batch JT, Lamsal SP, Adkins M, Sultan S, Ramirez MN. Advantages and Disadvantages of the Ketogenic Diet: A Review Article. Cureus. 2020;12(8). doi: