Carb calculator for weight loss for women

Over the decades carbohydrates have been given a bad name. Dating back as far as 1860 and popularized in the 1972s, have since been a strategy for weight loss.

Lowering carbohydrates is shown to reduce insulin, and improve cardiometabolic function, and weight loss. Benefits which when marketed correctly can have you believe that carbs are the enemy and the reason for your weight gain.

However, this couldn’t be further from the truth, as carbohydrates take the blame for poor nutrition, and the consumption of excess calories and processed foods.

In this article, we introduce the carb calculator for weight loss for women. How it works, the best sources of carbs, how to adjust for menopause, and how to avoid overcorrecting with an unsustainable, strict, lower-carb diet.

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215 Calories Burned
215 Calories Burned
215 Calories Burned
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Carbs
151g
55.6%
Protein
151g
55.6%
Fats
151g
55.6%
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What Is a Carb Calculator for Weight Loss?

The carb calculator for weight loss is a digital tool designed to help you monitor and modify your carbohydrates for sustainable weight loss. The calculator factors in daily calories, macros, age, weight, activity levels, and training goals to determine your carbohydrate intake.

Why Women Over 40 Need a Personalized Carb Target

For women, the 40s provide significant challenges that impact their physical health. By 20, energy expenditure is shown to steadily decline by 1–2 per decade, while muscle mass is proven to decrease by 3–8% per decade after 30.

Entering the 40s, women experience a decline in estrogen levels, leading to menopause. This brings on increased appetite and is shown to shift weight distribution increasing abdominal and visceral obesity.

Sources indicate this may also increase low-grade inflammation and the risk of chronic illness.

This is due in large part to the decline of estrogen which regulates and protects many systems in the body.

Here, adjusting carbohydrate intake can improve insulin sensitivity and aid in weight loss. However, cutting carbs completely is an unsustainable overcorrection that will likely result in weight gain, exacerbating these symptoms.

A personalized approach tailors carbohydrates to an individual's specific wants, needs, and goals. Ensuring they have enough carbohydrates to address health concerns while reducing the negative health implications that come in the 40s.

How to Use the Carb Calculator for Women

  • Select Metric Or Imperial Units: Determine the units your inputs and results will be displayed.
  • Enter Your Weight, Height, Age, And Activity Level: They determine your basal metabolic rate which is your body’s energy expenditure at rest.
  • Choose Your Fat Loss Goal (Moderate Or Aggressive): This will influence your calorie intake, and the quantity of carbohydrates.
  • Click Calculate To Receive Your Daily Carb Target In Grams: This will process your information and formulate the exact number of carbohydrates to help you achieve your weight loss goal.

What Are Macros?

Macronutrients or macros refer to carbohydrates, proteins, and fats, which are essential in many of the body’s processes. While each is used as fuel, they serve different purposes, making each of them vital for daily function. Below provide a brief description of each to illustrate their importance

Carbohydrates

Carbohydrates are one of the body’s primary fuel sources and typically make up 45–65% of a standard diet. Sources show they contain 4 calories (kcal) of energy and are proven to control blood glucose and insulin metabolism. Promote glucose uptake into stored glucose as glycogen for energy later on.

The confusion surrounding carbohydrates comes from the impact consuming simple carbohydrates has on blood sugar and insulin. Simple carbohydrates are when one or two sugars are combined, making them easily digestible, leading to a rapid rise in blood sugar and insulin secretion. Simple carbohydrates can contribute to insulin resistance, which can lead to diabetes.

Sadly, when people hear this, they automatically believe carbohydrates are the enemy, when it is actually the type of carbohydrates they are consuming.

A more constructive approach is to replace simple carbohydrates with complex carbohydrates. Complex carbohydrates contain three or more sugar bonds, meaning they take longer to digest. This provides a gradual increase in blood sugar and supports insulin sensitivity.

Furthermore, they can contain dietary fiber which is shown to act as a bulking agent, slowing digestion, while improving gut health, and insulin sensitivity. Here carbohydrates can still be consumed to gain these benefits, and intake can be modified to support weight loss.

Protein

Protein has many roles in the body, serving as the body’s building blocks used in enzymes, hormones, and the building and preservation of muscle. Making up 10–35% of a standard diet, they contain 4 kcal of energy per gram.

Protein is the most filling macronutrient, often forming the basis of weight loss diets. Sources show that protein increases satiety, and increases thermogenesis, which is the amount of energy required to digest food. Therefore, when consuming protein, not only will you want to consume fewer calories, but you will be burning more after each meal, resulting in greater weight loss.

Fats

Fats make up 20–35% of a standard diet and play a crucial part in the body, tasked with organ protection, nutrient absorption, and hormone production. Containing 9 kcal of energy per gram, they are the most calorie-dense macronutrient, which can make them a great source of energy.

However, several types of fat can make it challenging for beginners to navigate.

Unsaturated fats (monounsaturated and polyunsaturated) are considered healthy fats and have been shown to reduce inflammation and cardiovascular disease and support brain health.

Meanwhile, trans fats are considered unhealthy. Trans fats are shown to raise LDL cholesterol and increase the risk of heart disease, stroke, and type 2 diabetes.

For more information about macronutrients, read What Are Macros.

Why Carb Counting Beats Cutting Carbs

Counting and manipulating your carbohydrate intake allows you to take advantage of these benefits such as improved blood sugar, insulin sensitivity, satiety, and gut health while reducing negative effects such as insulin resistance and blood sugar spikes.

Furthermore, counting carbs is more sustainable, due to greater food volume, dietary fiber, and variety. Counting provides dietary flexibility that can help you adjust your carb intake based on activity, energy levels, and weight loss goals.

If you want to learn more, read How to Count Macros for Women.

Macros vs. Calories: What's the Difference?

Calories and macronutrients are both essential components of nutrition. Calories show the total energy content of food, while macros illustrate the composition of those calories in carbohydrates, protein, and fat.

Manipulating calorie intake is required to control weight, while macronutrients can be adjusted to ensure energy levels, muscle mass, and hormonal health are maintained during the process.

Below we display two foods with the same serving size with different calorie and macronutrients.

Food Lentils (100 g) Quinoa (100 g)
Calories 116 kcal 120 kcal
Carbohydrates 20.1 g 21.3 g
Protein 9 g 4.4 g
Fats 0.4 g 1.9 g


Lentils and quinoa are both excellent nutrient-dense complex carbohydrates and a perfect example of different macronutrient composition. Both have similar amounts of carbohydrates, however, lentils have more protein and less fat.

This does not mean lentils are better than quinoa but rather contain a greater source of protein, which should be considered when aiming to hit your daily carbohydrate and protein targets.

For a detailed look, we recommend reading Counting Macros vs Calories for more information.

Best Carb Sources for Women Over 40

Being able to identify excellent sources of carbohydrates is essential when counting carbs. Below, we list the best carb sources and best foods for easy macro counting to manipulate your carbohydrate intake to meet your needs.

Food Carbs (g/100 g) Nutrients
Oats 66.3 g Fiber, protein, B complex, selenium, zinc, potassium, magnesium, manganese
Whole Wheat Bread 43 g Fiber, B complex, magnesium, iron, zinc, selenium, calcium
Brown Rice 24 g Fiber, magnesium
Beans 24 g Iron, magnesium, potassium, vitamins C, K, B6
Quinoa 21.3 g Magnesium, fiber, iron, vitamin B6
Lentils 20.1 g Fiber, potassium, iron, magnesium, vitamin B6
Sweet Potato 20.1 g Iron, magnesium, potassium, fiber, vitamins A, B6
Potato 17 g Iron, magnesium, vitamins C and B6

Carb Targets for Fat Loss vs. Muscle Gain

Where carbohydrate counting really shines is when it can be used to help your goals for fat loss and muscle gain. Below we display basic details for each goal including a brief description and ideal macronutrient ratio recommendations.

Here is the macronutrient ratio for the traditional diet:

  • Carbohydrates: 45–65% of daily calorie intake
  • Protein: 10–35% of daily calorie intake
  • Fat: 20–35% of daily calorie intake

Fat Loss

Fat loss is achieved by entering a calorie deficit, which is when you consume fewer calories than your daily expenditure. As expected, this can lead to hunger and even the loss of muscle mass.

During this, protein is often prioritized to improve satiety and preserve muscle. However, a straight increase in protein would result in greater calorie intake. Here, carbohydrates are lowered to ensure a calorie deficit is maintained.

The following macronutrient ratio is great for fat loss, providing a boost in protein for muscle preservation and fullness, while eating enough carbs for energy.

  • Carbohydrates: 40% of daily calorie intake
  • Protein: 30% of daily calorie intake
  • Fat: 30% of daily calorie intake

Muscle Gains

Building muscle on the other hand requires a greater carbohydrate and protein intake. Carbohydrates are required to fuel workouts and replenish the body’s energy stores known as glycogen following intense resistance training sessions.

Sources indicate that carbohydrates are stored in the liver (80–120 g) and muscle (350–700 g) which are both used during resistance training. These stores are used and can be depleted, and when they are not replenished, it can impact performance.

To achieve this, carbohydrates will need to make up 40–60% of your daily energy intake.

Meanwhile, protein must also be consumed for muscle growth and recovery. Research suggests that 1.4–1.6 g/kg/day is recommended for muscle growth and recovery.

  • Carbohydrates: 40–60% of daily calorie intake
  • Protein: 20–30% of daily calorie intake
  • Fat: 20–30% of daily calorie intake

During both processes, carbohydrates and protein must sustain energy levels, support muscle mass, and improve fullness. This requires continuous monitoring and adjusting of macros to maintain energy levels and improve recovery.

For more information about macronutrient intakes for different goals, read these excellent resources:

Adjusting Carbs Based on Your Age and Hormones

Carbohydrate needs can vary based on several factors, with two being age and hormones. As we age, energy expenditure is shown to decline due to reduced physical activity, and decreased fat-free mass.

During aging the quality of carbohydrates becomes more important than quantity, as fewer carbs may be needed for fuel, and more protein is required to preserve muscle mass.

Sources even show that high-quality carbohydrate intake such as whole grains, fruits, vegetables, and legumes during mid-life are associated with healthier aging. Included in this is the consumption of dietary fiber which reduces the risk of total mortality and chronic disease.

High-quality (complex) carbohydrates and fiber can help regulate blood sugar and insulin. This results in fewer energy dips and greater fullness which can prevent overeating, helping to prevent weight gain.

For more information about how to adjust your carbohydrates and macronutrients for different ages, read these amazing resources:

Carbs and Menopausal Weight Gain

As mentioned, women experience several challenges during menopause including fatigue, gut issues, increased appetite, decreased muscle mass, and slowing metabolism which can lead to weight gain and even obesity.

After menopause fat distribution shifts from the thighs to the abdomen which increases the risk of cardiometabolic disease.

Sources show that obesity can lead to increased inflammation, insulin resistance, and the risk of chronic illness, such as type 2 diabetes, cardiovascular disease, respiratory problems, and joint and muscle aches.

For many hearing this, the knee-jerk reaction would be to cut carbs to dramatically reduce body weight and improve insulin sensitivity. However, as we know, this is not necessary.

High-quality, complex carbohydrates and fiber can be consumed to alleviate and address many of these symptoms.

Modifying carbohydrate intake ensures satiety, energy, levels, and gut health are maintained, leading to sustainable weight loss. As weight decreases, insulin sensitivity, respiratory problems, and muscle and joint aches can improve, enhancing health and quality of life.

How to Track Your Daily Carbs for Weight Loss

Carb counting certainly takes more effort than simply avoiding them, however, the benefits are certainly worth the effort.

Fortunately, the act of counting carbs and calories has never been easier with nutrition apps. These provide large food databases, complete with nutritional breakdowns to help streamline the tracking process.

If you are curious about macro tracking and its benefits, read our article on the 10 Benefits of Tracking Macros.

Sources

  1. Oh, R., Gilani, B. & Uppaluri, K.R., 2023. Low-Carbohydrate Diet. StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing. https://www.ncbi.nlm.nih.gov/books/NBK537084/
  2. Manini TM. Energy expenditure and aging. Ageing Res Rev. 2010 Jan;9(1):1-11. doi: 10.1016/j.arr.2009.08.002. Epub 2009 Aug 19. PMID: 19698803; PMCID: PMC2818133. https://pmc.ncbi.nlm.nih.gov/articles/PMC2818133/
  3. Volpi E, Nazemi R, Fujita S. Muscle tissue changes with aging. Curr Opin Clin Nutr Metab Care. 2004 Jul;7(4):405-10. doi: 10.1097/01.mco.0000134362.76653.b2. PMID: 15192443; PMCID: PMC2804956. https://pmc.ncbi.nlm.nih.gov/articles/PMC2804956/
  4. Pernoud, L.E., Gardiner, P.A., Fraser, S.D., Dillon-Rossiter, K., Dean, M.M. & Schaumberg, M.A., 2024. A systematic review and meta-analysis investigating differences in chronic inflammation and adiposity before and after menopause. Maturitas, 190, 108119. https://doi.org/10.1016/j.maturitas.2024.108119. https://www.sciencedirect.com/science/article/abs/pii/S0378512224002147
  5. Opoku, A.A., Abushama, M. & Konje, J.C., 2023. Obesity and menopause. Best Practice & Research Clinical Obstetrics & Gynaecology, 88, 102348. https://doi.org/10.1016/j.bpobgyn.2023.102348. https://www.sciencedirect.com/science/article/pii/S1521693423000482
  6. Pernoud, L.E., Gardiner, P.A., Fraser, S.D., Dillon-Rossiter, K., Dean, M.M. & Schaumberg, M.A., 2024. A systematic review and meta-analysis investigating differences in chronic inflammation and adiposity before and after menopause. Maturitas, 190, 108119. https://doi.org/10.1016/j.maturitas.2024.108119. https://www.sciencedirect.com/science/article/abs/pii/S0378512224002147
  7. Espinosa-Salas, S. & Gonzalez-Arias, M., 2023. Nutrition: Macronutrient Intake, Imbalances, and Interventions. StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing. https://www.ncbi.nlm.nih.gov/books/NBK594226/
  8. Holesh JE, Aslam S, Martin A. Physiology, Carbohydrates. 2023 May 12. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan–. PMID: 29083823. https://pubmed.ncbi.nlm.nih.gov/29083823/
  9. Mao, T., Huang, F., Zhu, X., Wei, D. & Chen, L., 2021. Effects of dietary fiber on glycemic control and insulin sensitivity in patients with type 2 diabetes: A systematic review and meta-analysis. Journal of Functional Foods, 82, 104500. https://doi.org/10.1016/j.jff.2021.104500. https://www.sciencedirect.com/science/article/pii/S1756464621001493
  10. Halton TL, Hu FB. The effects of high protein diets on thermogenesis, satiety and weight loss: a critical review. J Am Coll Nutr. 2004 Oct;23(5):373-85. doi: 10.1080/07315724.2004.10719381. PMID: 15466943. https://pubmed.ncbi.nlm.nih.gov/15466943/
  11. Dhaka V, Gulia N, Ahlawat KS, Khatkar BS. Trans fats-sources, health risks and alternative approach - A review. J Food Sci Technol. 2011 Oct;48(5):534-41. doi: 10.1007/s13197-010-0225-8. Epub 2011 Jan 28. PMID: 23572785; PMCID: PMC3551118. https://pmc.ncbi.nlm.nih.gov/articles/PMC3551118/
  12. Henselmans M, Bjørnsen T, Hedderman R, Vårvik FT. The Effect of Carbohydrate Intake on Strength and Resistance Training Performance: A Systematic Review. Nutrients. 2022 Feb 18;14(4):856. doi: 10.3390/nu14040856. PMID: 35215506; PMCID: PMC8878406. https://pmc.ncbi.nlm.nih.gov/articles/PMC8878406/
  13. Cintineo HP, Arent MA, Antonio J, Arent SM. Effects of Protein Supplementation on Performance and Recovery in Resistance and Endurance Training. Front Nutr. 2018 Sep 11;5:83. doi: 10.3389/fnut.2018.00083. PMID: 30255023; PMCID: PMC6142015. https://pmc.ncbi.nlm.nih.gov/articles/PMC6142015/
  14. Manini TM. Energy expenditure and aging. Ageing Res Rev. 2010 Jan;9(1):1-11. doi: 10.1016/j.arr.2009.08.002. Epub 2009 Aug 19. PMID: 19698803; PMCID: PMC2818133. https://pmc.ncbi.nlm.nih.gov/articles/PMC2818133/
  15. Ardisson Korat AV, Duscova E, Shea MK, Jacques PF, Sebastiani P, Wang M, Mahdavi S, Eliassen AH, Willett WC, Sun Q. Dietary Carbohydrate Intake, Carbohydrate Quality, and Healthy Aging in Women. JAMA Netw Open. 2025 May 1;8(5):e2511056. doi: 10.1001/jamanetworkopen.2025.11056. PMID: 40377936; PMCID: PMC12084844. https://pmc.ncbi.nlm.nih.gov/articles/PMC12084844/

FAQs

What is a macro calculator?
A macro calculator helps you find the ideal daily intake of proteins, carbs, and fats (macronutrients) based on your personal health goals and lifestyle.
How accurate is this macro calculator for women over 40?
Our calculator uses proven formulas adjusted specifically for women over 40, considering hormonal changes, metabolism, and activity levels for maximum accuracy.
Why are macros important during menopause?
Balanced macros help manage menopausal symptoms, support metabolism, protect muscle mass, and stabilize mood and energy levels.
How often should I recalculate my macros?
Recalculate every 4-6 weeks or when your weight, activity levels, or health goals change significantly.
Can macros help me lose weight after 40?
Yes, customizing your macros helps optimize fat loss, preserve muscle, and combat metabolic slowdown common during menopause.
Do I need to track calories if I track macros?
Tracking macros already manages calories indirectly, making it unnecessary to track calories separately for most women.
Should I prioritize protein in my macros after age 40?
Yes, protein becomes more essential after 40 to maintain muscle mass, bone health, and metabolism during perimenopause and menopause.
Is this macro calculator suitable if I'm not very active?
Absolutely. The calculator personalizes recommendations based on your actual activity level, whether sedentary, moderately active, or highly active.
How do I start using the macro calculator results in my daily life?
Start by using a food tracking app or journal to log meals, adjusting portions to match the suggested macros until it becomes intuitive.
Are the macro recommendations safe long-term for women over 40?
Yes, the recommendations are designed to support sustained health, energy, and hormonal balance safely for long-term use.

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