How to Set Your Macro Targets in 4 Steps

Key takeaways

1. Calories come first: the size of your deficit or surplus is what changes your weight.
2. Set protein in grams per kg of body weight, about 1.2–1.6 g/kg for most people and 1.4–2.0 g/kg if you train.
3. Give fat 20–35 % of calories and treat 20 % as a floor, not a goal.
4. Carbohydrates fill the remaining calories, and the carb-to-fat balance can follow your preference.
5. Judge targets on two to three weeks of averages and adjust calories before reshuffling macros.

What does setting macro targets actually mean?

A macro target is a daily amount, in grams, of each of the three macronutrients: protein, carbohydrates and fat. Together they add up to your calorie target, because every gram carries a fixed amount of energy: 4 kcal for protein, 4 kcal for carbohydrates and 9 kcal for fat. If you are new to the idea, our guide to what macros are covers the basics.

The order matters. Calories come first, because your deficit or surplus is what moves your weight. Protein comes second, as the macro with the clearest target for keeping muscle and feeling full. Fat comes third, with a sensible minimum, and carbohydrates fill whatever is left.

Step 1: How do you find your calorie target?

Start with an estimate of your daily energy needs. The Mifflin-St Jeor equation is the most widely used formula for resting energy expenditure:

• Men: 10 × weight (kg) + 6.25 × height (cm) − 5 × age + 5
• Women: 10 × weight (kg) + 6.25 × height (cm) − 5 × age − 161

Multiply the result by an activity factor: 1.2 if you are mostly sitting, 1.375 if lightly active, 1.55 if moderately active, 1.725 if very active and 1.9 for very hard daily training. That gives your maintenance calories, also called TDEE. Our guide to TDEE and maintenance calories explains each part.

Take a 35-year-old man who weighs 80 kg (176 lb), is 178 cm tall and is moderately active. His resting estimate is 10 × 80 + 6.25 × 178 − 5 × 35 + 5 = about 1,743 kcal. Multiplied by 1.55, his maintenance is about 2,700 kcal. To lose weight at a steady pace he subtracts 500 kcal and aims for 2,200 kcal a day.

A typical safe pace is about 0.5–1 kg (1–2 lb) a week. Do not go below about 1,200 kcal a day for women or 1,500 kcal a day for men without medical supervision. You can run your own numbers here:

Step 2: How much protein should you set?

Protein is set in grams per kilogram of body weight, not as a percentage, because your needs depend on your size rather than on how much you eat overall. The reference points:

• The adult Recommended Dietary Allowance is 0.8 g/kg, the amount that covers basic needs for most healthy adults.
• The International Society of Sports Nutrition (ISSN) suggests 1.4–2.0 g/kg for people who exercise regularly.
• The ISSN's 2026 position stand on diets for weight reduction suggests 1.2–1.6 g/kg for the general population to support weight and fat loss.

Our example man trains three times a week, so he picks 1.6 g/kg: 80 × 1.6 = 128 g of protein, which is 128 × 4 = 512 kcal, or about 23 % of his 2,200 kcal. That sits comfortably inside the Acceptable Macronutrient Distribution Range (AMDR) for protein of 10–35 %. For more detail on choosing a number, see how much protein you need per day.

Step 3: How much fat do you need?

Fat is needed for hormones, cell membranes and absorbing vitamins A, D, E and K. The AMDR for adults is 20–35 % of calories. A practical starting point is around 30 %, then adjust to taste.

For our example: 2,200 × 0.30 = 660 kcal, and 660 ÷ 9 = about 73 g of fat. The lower end of the range, 20 %, would be 440 kcal or about 49 g. Treat 20 % as a minimum rather than a goal. Our guide to how much fat to eat covers which fats to favour.

Step 4: Do carbohydrates just fill the rest?

Yes. Once protein and fat are set, carbohydrates take the remaining calories:

• 2,200 − 512 (protein) − 660 (fat) = 1,028 kcal
• 1,028 ÷ 4 = about 257 g of carbohydrates, roughly 47 % of calories

That is within the AMDR for carbohydrates of 45–65 %. If you prefer fewer carbs and more fat, you can shift the balance: the ISSN position stand concludes that the carbohydrate-to-fat ratio can be matched to personal preference for weight loss, since approaches from low-fat to ketogenic perform similarly. Keep protein fixed and move calories between the other two.

What do the finished targets look like?

Here are two worked examples side by side. The second is a 45-year-old woman who weighs 68 kg, is 163 cm tall and is lightly active: her resting estimate is about 1,313 kcal, her maintenance about 1,805 kcal, and she chooses a gentler 300 kcal deficit.

Notice that the woman's fat is set slightly lower, at 28 %, so that carbohydrates stay inside the 45–65 % range.

How do the targets turn into meals?

Dividing protein across the day is usually the easiest way to hit it. For active people in a deficit, the ISSN suggests spreading protein over at least three protein-rich meals. For 128 g, that is roughly 30–40 g at each main meal plus a protein-containing snack.

A sample day for the 2,200 kcal target, using our per-serving estimates (real values depend on recipe and portion):

• Breakfast: oats, yogurt and fruit, 390 kcal, 22 g protein, 58 g carbs, 9 g fat
• Lunch: chicken quinoa power bowl, 520 kcal, 50 g protein, 45 g carbs, 14 g fat
• Snack: hummus and raw vegetables, 260 kcal, 11 g protein, 34 g carbs, 10 g fat
• Dinner: baked salmon and sweet potato, 540 kcal, 44 g protein, 42 g carbs, 20 g fat

That comes to 1,710 kcal with 127 g of protein, 179 g of carbs and 53 g of fat. Protein is already on target, which leaves about 490 kcal, mostly as 78 g of carbs and 20 g of fat, for bread, fruit, rice, a drizzle of olive oil or a treat. This is the typical pattern: plan the protein, and the rest has room to flex.

How precise do you need to be?

Not very. Food labels and databases are estimates, and portions vary. Landing within a few grams of protein and within roughly 100 kcal of your calorie target on most days is plenty.

If tracking every gram feels like too much, a simpler version works well: track calories and protein, and let carbs and fat land where they land. Logging in Sporty shows calories and all three macros for each meal, so you can see whether protein is on track without doing the maths yourself.

When should you adjust your macro targets?

Give a new set of targets two to three weeks before judging it, because day-to-day weight swings are mostly water. Then:

1. If your weekly average weight is not moving, adjust calories first, by about 100–200 kcal, and take them mainly from carbs or fat.
2. If you are hungry all the time, check that protein is on target and consider a smaller deficit.
3. After losing weight, recalculate with your new body weight, since both maintenance and protein targets shift.

Who should get personal advice first?

These steps are general information, not medical advice. Talk to a doctor or registered dietitian before setting targets if you are pregnant or breastfeeding, under 18, have kidney disease (higher protein intakes may not suit you), have diabetes or take glucose-lowering medication, or have a history of an eating disorder.

Frequently asked questions

What is a good macro ratio for weight loss?

There is no single best ratio. A common starting point is about 25 % protein, 30 % fat and 45 % carbohydrates, but setting protein in grams per kg and splitting the rest by preference works just as well, as long as calories are in a deficit.

Should I set protein by percentage or by body weight?

By body weight. Grams per kg stay sensible whatever your calorie target is, while a percentage can give too little protein on a low-calorie plan or more than you need on a high one.

Do I need to hit my macros exactly every day?

No. Being within a few grams of protein and roughly 100 kcal of your calorie target on most days is enough. Weekly averages matter more than any single day.

Can I eat low-carb and still use this method?

Yes. Keep calories and protein the same and move calories from carbohydrates to fat. If you have diabetes or take glucose-lowering medication, talk to your doctor before cutting carbohydrates sharply.

Sources

• Mifflin et al. 1990, A new predictive equation for resting energy expenditure
• National Academies, DRI for Energy and Macronutrients
• ISSN position stand: protein and exercise (Jäger et al. 2017)
• Aragon et al. 2026, ISSN position stand: diets for body weight reduction (J Int Soc Sports Nutr)

This article is general information, not medical advice. If you have a health condition, are pregnant or under 18, talk to a doctor or registered dietitian before changing your diet.