Your Ideal Macros for Weight Loss
Need to Know
Studies suggest that ideal macronutrient ratios for weight loss are approximately 45% to 55% of calories from carbs, 25% to 30% from protein, and 15% to 30% from fat.
Research also suggests that personalization is key for long-term weight loss. The best macro ratios for you will depend on your current diet, your lifestyle, your workouts, and your goals.
Finding your optimal weight loss ratios will require making some adjustments from time to time.
The best macro ratio for weight loss is roughly 45% to 55% of calories from carbs, 25% to 30% of calories from protein, and 15% to 30% of calories from fat. These ratios fall within dietary guidelines provided by nutrition experts, but they also leave enough wiggle room to tailor the numbers to meet your personalized needs.
Finding the Best Macro Ratios to Lose Weight
There is no one-size-fits-all solution when it comes to weight loss. People are motivated to lose weight for different reasons, and your motivation will play a part in determining the best diet for you. For example, someone trying to lose weight to get off blood pressure medication may choose a different nutritional plan (such as the DASH diet) than somebody who is trying to lose weight to look better at their upcoming class reunion. Research continues to show that a personalized approach to weight loss is necessary for long-term success. (1)
So, there is no “best” macro ratio for weight loss. Instead, you want to find the ideal macro ratio for you. There are different strategies to consider, and studies have weighed in on each of them.
Low-fat diets are popular because they restrict the macronutrient that provides the highest number of calories per gram. But studies show that low-fat diets tend to be unsustainable and therefore ineffective in the long-term.(1)
Low-carbohydrate diets are popular because they limit the number of calories from the macronutrient that is most commonly consumed, therefore reducing overall food intake and caloric intake. Studies have suggested that low-carb diets are often effective in the short-term but less effective long-term, due to a lack of sustainability.(2)
High-protein diets can be low-fat or low-carb, but what makes them unique is that they focus on protein intake, rather than carb or fat restriction. Studies have suggested that higher protein intakes are beneficial for weight loss. (3)
Because studies have yielded mixed results regarding the best macro balance for weight loss, experts continue to suggest that personalization and sustainability are key.(4) If you currently consume a typical American diet, choosing a highly restrictive plan is likely to backfire. Instead, choose a diet plan that offers moderate intakes of each macro and then make adjustments as needed.
Furthermore, diet quality matters.(5) Whichever macro ratio you choose, be sure to fill your meals with nutrient-dense foods. I’ve listed great choices for each macro below. Explore each list and fill your diet with foods you enjoy. You can also use the macro calculator to get a personalized macro ratio for weight loss.
45% to 55% of Calories from Carbs
Carbohydrates are your body’s preferred fuel source, providing 4 calories of energy per gram. So, getting enough carbs throughout the day is important to maintain energy for all of your daily activities, including your workouts.
Carbs come in three forms:
Sugars are also called “simple carbohydrates” because they have the most basic molecular structure. Sugars are found naturally in foods like fruit (fructose) and milk (lactose), but they are also added to foods like baked goods, candy, and soda. Sugars are not necessarily bad for you, but you want to maximize your intake of naturally occurring sugars and minimize your intake of added sugars. You’ll find “Added Sugars” on the Nutrition Facts label under the Carbohydrates category.
Starches are also called “complex carbohydrates” because they are broken down and converted to sugar in the body. Starches are found in foods like bread and pasta and in starchy vegetables like potatoes and peas. If you can choose starchy foods that provide other nutrients (like the protein in peas or the potassium in potatoes), you’ll be doing your body a favor.
Fiber is also a complex carb, but it is largely undigestible in the body. Fiber can be soluble (like the fiber in oatmeal) or insoluble (like the fiber in whole grains). When you are trying to lose weight, fiber is recommended because it helps to keep you full longer after eating, and it contributes fewer calories than other forms of carbs because it is only minimally digested in the body. You’ll see fiber grams listed on the Nutrition Facts label under the Carbohydrates category.
Pro Tip: You’ll want to aim for the higher end of the carb intake range if you regularly participate in endurance activities, like running. You need extra carbs to fuel those workouts.
The best carbs for weight loss are packed with flavor and provide fiber along with plenty of vitamins and minerals.
Leafy green vegetables like spinach or kale
Cruciferous vegetables like broccoli or asparagus
Berries, like blueberries and raspberries
Bananas
Cauliflower
Whole-grain bread or crackers
Brown rice or wild rice
Quinoa, teff, or farro
This is not a complete list of macro-friendly foods, but it gives you an idea of what to look for when shopping for high-quality carbs.
25% to 30% of Calories from Protein
Protein provides structure to cells and is essential for maintaining muscle mass. Protein can also help you build muscle when participating in a strength training program. Protein provides 4 calories of energy per gram.
Amino acids are the building blocks of protein. There are two types of amino acids: essential and non-essential.
Non-essential amino acids are made in the body, so they do not need to be consumed in the diet. They include alanine, arginine, asparagine, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine, and tyrosine.
Essential amino acids are not made in the body, so they must be consumed in the diet. There are nine essential amino acids: histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.
You won’t usually find amino acids listed on food labels in the grocery store. Choosing a range of different protein foods will help you get the essential amino acids you need.
Pro Tip: You’ll want to aim for the higher end of the protein intake range if you regularly participate in strength-training activities, like weightlifting. You need extra protein to build muscle and gain strength to fuel those workouts.
The best protein sources for weight loss provide amino acids without providing too much saturated fat. Healthy lean proteins include:
Lean cuts of beef, like beef tenderloin
Turkey without the skin
Chicken without the skin
Low-fat or nonfat dairy products
Eggs or egg whites
Fish
Shellfish
Tofu
Soybeans
Protein supplements like whey protein powder
Protein-rich grains like quinoa
15% to 30% of Calories from Fat
Fat is important when trying to lose weight because it helps you maintain healthy cells and allows you to absorb important vitamins (A, D, E, and K). Fat also contributes to a feeling of satiety (feeling full and satisfied after eating). But because fat provides 9 calories per gram, it is important to consume fat in moderation. Going over your fat macros can result in weight gain.
There are three different types of fat:
Saturated fat is solid at room temperature and is found in animal-based foods like full-fat dairy (butter, cream, etc) and fatty meats (like hamburger). Saturated fat contributes to higher “bad” cholesterol levels in the body and is associated with a higher risk for heart disease.
Polyunsaturated fat is found in animal and plant-based foods like salmon, vegetable oils, and some nuts and seeds. Along with monounsaturated fat, it is considered a “healthy” fat.
Monounsaturated fat is found in plant-based foods like nuts, avocados, and vegetable oils. Choosing mono- or polyunsaturated fat instead of saturated fat is associated with a decreased risk of heart disease.
Pro Tip: You’ll want to aim for the higher end of the fat intake range if you have had trouble maintaining diets in the past. You may need greater satiety and food satisfaction after eating to maintain your plan.
The best fats for weight loss provide more unsaturated fat and less saturated fat. Many foods contain all three types of fat.
Sunflower seeds or sunflower oil
Flax seeds or flax oil
Nuts, like almonds or walnuts
Avocado or avocado oil
Olive oil
Sesame oil
Chia seeds
Fatty fish, such as salmon, mackerel, herring, albacore tuna, and trout
4 Steps to Find Your Ideal Weight Loss Macros
Visit my blog post about Tracking Macros for Weight Loss to get details about the four steps you need to follow to find the specific weight loss macros that are best for you.
The four steps include:
Establish your starting point. Keep a journal for 5-7 days to determine how many calories and how much of each macro you are currently consuming.
Create a deficit. Decrease your calorie intake by about 500 calories per day to lose about a pound of fat per week.
Calculate your macro targets: Adjust your current macro intake by no more than 10% for each macro. Then, based on the percentages you’ve determined, calculate the number of grams of each macro to consume. You can also use the daily macros calculator for this step.
Begin tracking. Use an app, a macro tracking spreadsheet, or an old-school pen-and-paper method to track your macro intake each day and get as close to each macro target as you can.
Tips for Weight Loss Success
Consistency is key, but perfection is not required. If you veer off your ideal macronutrient plan, don’t worry too much. If it happens often, however, you should evaluate your diet. It is very likely that your plan is too restrictive and needs adjustment.
Evaluate and adjust as needed. Your starting macronutrient ratios are not likely to be your ideal macros for weight loss. You’ll need to make some tweaks here and there to find a plan that keeps you satisfied and fits in your lifestyle. Make a point to evaluate your diet every few weeks (when starting out) or every few months (when you are at your goal weight) to find your best plan.
When in doubt, prioritize protein. Studies consistently show that protein intake matters for weight loss and general health. If you are in a situation where you can’t reach perfect macro ratios, simply build meals around lean protein and add healthy carbs and fats in moderation.
Invest in nutritious foods. Choosing high-quality foods will be important on your journey to lose weight, so choose foods wisely under each macro category. Consuming nutrient-rich, delicious foods will help you to stay full longer after eating and will help you to stick to the program long enough to reach your weight loss target, but also maintain your weight loss for the long-term.
You can also pick up a copy of Macro Diet for Dummies to keep on hand. It’s the best resource for a macro-tracking beginner and even helpful for expert macro trackers. The book includes recipes, tips, and insider advice for following a macro diet for weight loss, fitness, or wellness.
Sources:
Kim JY. Optimal Diet Strategies for Weight Loss and Weight Loss Maintenance. J Obes Metab Syndr. 2021 Mar 30;30(1):20-31. doi:10.7570/jomes20065
Ge L, Sadeghirad B, Ball GDC, da Costa BR, Hitchcock CL, et al. Comparison of dietary macronutrient patterns of 14 popular named dietary programmes for weight and cardiovascular risk factor reduction in adults: systematic review and network meta-analysis of randomised trials. BMJ. 2020 Apr 1;369:m696. doi:10.1136/bmj.m696
Zhang H, Vasileiou A, Searle D, Larsen SC, Senior AM, Magkos F, Ward LC, Horgan G, Santos I, Palmeira AL, Simpson SJ, Raubenheimer D, Stubbs RJ, Heitmann BL. Dietary Macronutrient Composition and Protein Concentration for Weight Loss Maintenance. Obesity (Silver Spring). 2025 Oct;33(10):1995-2004. doi:10.1002/oby.24370
University of Alabama Medicine. Diet Plans: The Best One for You Is One You Can Stick To.
Harvard T. H. Chan School of Public Health. The Best Diet: Quality Counts