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Health May 2026 · 9 min read

Protein, Carbs & Fats: How to Calculate Your Macro Split for Body Recomposition

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Renjith Pillai

Senior Systems Architect & Financial Analyst

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While total calorie intake dictates weight loss or gain, your macronutrient split (Protein, Carbs, and Fats) determines body composition—whether weight lost is fat or lean muscle.

Protein Requirements for Active Individuals

Aim for 1.6 to 2.2 grams of high-quality protein per kilogram of body weight during calorie deficits to preserve muscle mass. Each gram of protein provides 4 kcal.

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Frequently Asked Questions

What is the caloric density of macros?+
Protein = 4 kcal/g, Carbohydrates = 4 kcal/g, Fat = 9 kcal/g.
Can I build muscle and lose fat at the same time?+
Yes! Body recomposition is achievable by maintaining a modest 300 kcal deficit, consuming high protein (2.0g/kg), and performing progressive resistance training.

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R

Renjith Pillai

Senior Software Engineer & Network Specialist

Renjith Pillai is a senior software engineer and financial tools author with over 12 years of experience. He built EasyCalcs.in to provide high-precision, privacy-first technical tools and financial calculators for investors, engineers, and consumers.