Free Macro Calculator for Weight Loss

Free macros calculator for weight loss. Set a calorie deficit and get daily protein, carbs, and fat targets.

For weight loss, a 70 kg person at 1,800 kcal typically needs about 154 g protein, 50 g fat, and 184 g carbs (Cut). Keep protein high and eat ~500 kcal below maintenance. Goal defaults to Cut below.

Daily split uses protein per kg plus calorie remainder. Not medical advice.

Daily macro targets

Daily calories Don’t know this? Use the TDEE calculator. Weight

Goal

What Is a Macros Calculator for Weight Loss?

A macros calculator for weight loss sets daily protein, carbs, and fat so you can sit in a calorie deficit without starving muscle. This free macro calculator for weight loss uses a high-protein cut split by default. Same idea as other fat-loss tools: pick calories, lock protein, fill the rest with carbs and fat.

Need maintenance calories first? Use the BMR & TDEE calculator. To log a recipe, use the Recipe Calorie Calculator.

What Are Macros?

Macros are the nutrients you eat in large amounts. Each one has a job and a calorie density:

Calories per gram for protein, carbs, and fat
Macro	kcal / gram	Main role	Common foods
Protein	4	Muscle repair, fullness, immune function	Chicken, fish, eggs, Greek yogurt, tofu
Carbohydrates	4	Primary fuel for brain and training	Rice, potatoes, fruit, oats, bread
Fat	9	Hormones, vitamins A/D/E/K, energy	Olive oil, nuts, avocado, oily fish
Alcohol	7	Not a target macro; still counts as calories	Beer, wine, spirits

Macro Ratios by Goal

There is no single perfect split. This calculator sets protein from body weight, fat as a percent of calories, and carbs as the remainder — the same structure used by most free macro calculators:

How this macro calculator splits cut, maintain, and bulk
Goal	Protein	Fat	Carbs
Cut (fat loss)	2.2 g / kg	25% of kcal	What’s left
Maintain	1.8 g / kg	28% of kcal	What’s left
Bulk (muscle gain)	1.8 g / kg	25% of kcal	What’s left

Protein first protects muscle in a deficit. Fat stays high enough for hormones. Carbs fill training energy. For a daily calorie number, use TDEE; for a deficit, the calorie deficit calculator.

Example Daily Macros (70 kg / 154 lb)

Same person, maintain protein at 1.8 g/kg (126 g) and fat at 28% — only calories change:

Daily macros at common calorie targets for a 70 kg adult (maintain settings)
Calories	Protein	Fat	Carbs
1,500 kcal	126 g	47 g	143 g
1,800 kcal	126 g	56 g	198 g
2,000 kcal	126 g	62 g	235 g
2,500 kcal	126 g	78 g	324 g
3,000 kcal	126 g	93 g	415 g

Protein stays fixed from body weight. Extra calories go to carbs and a bit more fat. Switch the calculator to Cut to raise protein to 2.2 g/kg.

How to Calculate Macros (Formula)

You can run the same math by hand:

Protein (g) = weight (kg) × 1.8 (or 2.2 to cut)

Fat (g) = calories × 0.28 ÷ 9

Carb calories = calories − (protein × 4) − (fat × 9)

Carbs (g) = carb calories ÷ 4

Example, 70 kg at 2,000 kcal, maintain: protein = 126 g (504 kcal). Fat = 2,000 × 0.28 ÷ 9 = 62 g (558 kcal). Carbs = (2,000 − 504 − 558) ÷ 4 = 235 g. If protein + fat exceed calories on a steep cut, fat is reduced first so protein still fits.

How to Use a Free Macro Calculator for Weight Loss

For fat loss, two numbers matter: a calorie deficit and enough protein. A typical cut is 300–500 kcal below TDEE. Protein at ~2.2 g/kg limits muscle loss. Carbs can drop; keep some around workouts if you train hard.

Choose Cut above, or get a full deficit plan from the calorie deficit calculator and a protein target from the protein intake calculator.

How to Hit Your Macros

Fix protein first (meat, dairy, eggs, or a plant combo).
Add fats for cooking and fullness (oil, nuts) without blowing the fat cap.
Fill the rest with carbs you actually like.
Check a recipe with the Recipe Calorie Calculator if you need food totals.

For a pre-built day of food, start a personalized meal plan or split the day with the calories per meal calculator.

Key Takeaways

A macro calculator turns a calorie target into daily protein, carbs, and fat grams.
Protein and carbs = 4 kcal/g; fat = 9 kcal/g.
Active adults: 1.6–2.2 g protein per kg. Fat loss uses the high end.
A 500 kcal deficit drives weight loss more than the exact ratio.
Goal defaults to Cut — switch to Maintain or Bulk if that is your target.

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