What Are Macros?
is short for macronutrients, the three main nutrients your body needs in large amounts every day: , , and . Each one plays a different role in your body, and each one contains a set number of calories per gram: protein has 4, carbs have 4, and fat has 9.
When people talk about "counting macros," they mean tracking how many grams of each nutrient they eat per day. The goal is to hit specific targets that match their calorie needs and fitness goals, whether that is losing fat, building muscle, or just eating in a more balanced way.
Step 1: Find Your TDEE
Before you can set your macros, you need to know how many calories your body burns in a day. This number is called your (Total Daily Energy Expenditure). It accounts for your metabolism, daily movement, and exercise.
The easiest way to find yours is to use our free TDEE calculator. Just enter your age, height, weight, and activity level, and it will give you a solid estimate in seconds.
Step 2: Set Your Calorie Target
Your TDEE is your maintenance number, the amount of calories that keeps your weight stable. What you do with that number depends on your goal:
- Lose fat: eat below your TDEE. A of 300-500 calories per day is a good starting point for steady, sustainable fat loss.
- Maintain weight: eat at your TDEE.
- Build muscle: eat above your TDEE. A surplus of 200-300 calories per day gives your body enough fuel to grow without excessive fat gain.
Step 3: Set Protein First
Protein is the most important macro to get right. It builds and repairs muscle, keeps you feeling full longer, and has the highest thermic effect, meaning your body burns more calories just digesting it compared to carbs or fat.
A good starting point is 0.7 to 1 gram of protein per pound of body weight. If you are active and strength training, aim for the higher end. If you are mostly sedentary, the lower end is fine.
For example, a 180-pound person would aim for 126 to 180 grams of protein per day. Since protein has 4 calories per gram, that works out to 504 to 720 calories from protein. You can also use our protein calculator to get a personalized recommendation.
Step 4: Set Fat
Fat is essential for hormone production, brain health, and absorbing certain vitamins. Cutting fat too low can backfire, especially for hormonal health. A good range is 25 to 35 percent of your total calories.
To calculate it, multiply your total daily calories by 0.25 to 0.35, then divide by 9 (since fat has 9 calories per gram). For someone eating 2,200 calories, that comes out to roughly 61 to 86 grams of fat per day.
Step 5: Fill the Rest With Carbs
Once protein and fat are set, whatever calories are left go to carbs. Carbohydrates are your body's preferred source of quick energy, and they fuel everything from brain function to intense exercise.
To find your carb target, subtract the calories from protein and fat from your total calories, then divide by 4 (since carbs have 4 calories per gram). The remaining number is your daily carb target in grams.
A Real Example
Let us walk through the math for a 180-pound person who wants to lose fat. Their TDEE is 2,500 calories, and they choose a 400-calorie deficit.
- Calorie target: 2,500 - 400 = 2,100 calories per day
- Protein: 180 lbs x 0.8 g/lb = 144 g protein = 576 calories
- Fat: 2,100 x 0.30 = 630 calories = 70 g fat
- Carbs: 2,100 - 576 - 630 = 894 calories = 224 g carbs
So the daily macro targets would be roughly 144 g protein, 70 g fat, and 224 g carbs. These are not exact rules. Hitting within 5 to 10 grams of each target on most days is plenty accurate.
Do Not Overthink It
Counting macros does not need to be complicated. The basics are straightforward: find your calories, set protein, set fat, fill in carbs. You do not need to weigh every grain of rice or track every bite to the gram. Consistency matters more than perfection.
If you want to skip the math entirely, use our free macro calculator. It does all of this for you in seconds. Just enter your details and goals, and it will give you your protein, carb, and fat targets. You can also fine-tune your calorie target with our TDEE calculator.