What are macros in food?

Macros (macronutrients) are the three main nutrients that provide energy: protein (4 cal/g), carbohydrates (4 cal/g), and fat (9 cal/g). Alcohol also provides calories (7 cal/g) but is not a macronutrient.

How many grams of protein per day do I need?

For muscle building or weight loss while preserving muscle, aim for 1.6–2.2g of protein per kg of body weight. A 70 kg person needs roughly 112–154g of protein per day.

Should I track macros or just calories?

Tracking macros gives you more control over body composition. You can lose the same weight on different macro splits, but high protein preserves muscle, and the right carb/fat balance affects energy and performance.

Macros for Beginners: How to Calculate Protein, Carbs & Fat | CalcQuick

Counting macros — protein, carbohydrates, and fat — is more effective than counting calories alone. Here's how to calculate your targets and which split to choose for your goal.

Macros — short for macronutrients — are the three main nutrients your body uses for energy: protein, carbohydrates, and fat. Tracking them gives you far more control over your body composition than tracking calories alone.

Here's why: two diets can have the same calorie total but very different results. A high-protein diet preserves muscle during weight loss. A high-carb diet fuels endurance training. A high-fat, low-carb diet can reduce hunger for some people. The macro split matters.

The Three Macronutrients

Protein (4 calories per gram) Protein is the building block of muscle. It's also the most satiating macronutrient — it keeps you full longer and requires more energy to digest than carbs or fat.

Best sources: chicken breast, eggs, Greek yogurt, cottage cheese, fish, tofu, legumes.

Carbohydrates (4 calories per gram) Carbs are your body's preferred energy source, especially for the brain and during high-intensity exercise. Not all carbs are equal — complex carbs (oats, rice, sweet potato) provide sustained energy; refined carbs (white bread, sweets) spike blood sugar quickly.

Fat (9 calories per gram) Fat is essential for hormone production, vitamin absorption, and brain function. Despite being calorie-dense, dietary fat does not directly cause fat storage — excess total calories do.

Best sources: olive oil, avocado, nuts, fatty fish, eggs.

How to Calculate Your Macro Targets

Step 1 — Find your daily calorie goal. Use your TDEE as a starting point, then add or subtract based on your goal (see our TDEE guide).

Step 2 — Set your protein first. Protein intake should be 1.6–2.2g per kg of body weight regardless of your goal. This protects muscle during a deficit and supports growth during a surplus.

Step 3 — Allocate remaining calories to carbs and fat based on your preferred split.

Common Macro Splits

Goal	Protein	Carbs	Fat
Balanced / General health	25%	45%	30%
Weight loss (high protein)	35%	35%	30%
Muscle gain	30%	45%	25%
Keto / Low-carb	25%	5%	70%

Example: A 2,000-calorie weight loss diet with a 35/35/30 split: - Protein: 2,000 × 0.35 ÷ 4 = 175g - Carbs: 2,000 × 0.35 ÷ 4 = 175g - Fat: 2,000 × 0.30 ÷ 9 = 67g

Use our Free Macro Calculator to get your exact targets in seconds.

Tracking Macros in Practice

Use a food tracking app (MyFitnessPal, Cronometer) to log meals and see macro totals.
Weigh food raw for the most accurate measurements.
Prioritize protein first — it's the hardest to hit and the most important.
Don't stress perfection. Being within 5–10g of your targets is close enough.

The Bottom Line

You don't need to track macros forever. Doing it for 4–8 weeks teaches you what's in your food and builds intuition about portion sizes. Most people see better body composition results from macro tracking than from calorie counting alone.

Macros for Beginners: How to Calculate Protein, Carbs and Fat