Universal Calculator
TAIIR

Body Recomposition Calculator

Calculate the calories, protein, and time needed to lose fat while building muscle. Supports metric (cm, kg) and imperial (in, lbs).

Recomposition Goal

Your Recomp Plan

Daily Calories

—

Protein

—

Estimated Time: —

Body Composition Changes

Current Lean Mass —
Target Lean Mass —
Fat to Lose —
Target Weight —

Nutrition Insight

Fat Intake—
Carb Intake—

Body Recomposition: The Science of Building Muscle and Losing Fat Simultaneously

Body recomposition—the holy grail of fitness—is the process of simultaneously decreasing body fat while increasing lean muscle mass. Contrary to outdated beliefs, it is entirely achievable with the right nutritional strategy and training protocol. This Body Recomposition Calculator provides a personalized plan based on your current metrics and goals, delivering the exact calorie and protein targets you need to reshape your physique.

The Three Pillars of Recomposition

  • Calorie Balance: Eat at maintenance calories or a very slight deficit (0‑15%). This calculator estimates your TDEE and adjusts based on your goal focus.
  • High Protein Intake: Protein is essential for muscle protein synthesis, especially in a deficit. Aim for 1.6‑2.2 g per kg of body weight (or per lb of lean mass).
  • Progressive Resistance Training: You must provide a stimulus for muscle growth. Focus on compound lifts and progressive overload 3‑5 times per week.

💡 Who Benefits Most from Recomposition?

Beginners (first 6‑12 months of training), those returning after a layoff, and individuals with higher body fat percentages (>20% men, >28% women) typically see the fastest recomposition results. Advanced lifters can still recomp but at a slower rate.

Understanding Your Results

  • Calorie Target: Your estimated daily energy intake to support recomposition. Adjust based on real‑world results (weight trending down slowly or maintaining while getting leaner).
  • Protein Target: Based on lean body mass to maximize muscle retention and growth. Spread intake evenly across 3‑5 meals.
  • Estimated Time: Based on a realistic weekly rate of body composition change. Recomposition is a marathon, not a sprint—trust the process.

Frequently Asked Questions

Can I really build muscle in a calorie deficit?

Yes, especially if you are new to training, have higher body fat, or consume adequate protein. The body uses stored fat for energy while using protein to repair and build muscle tissue.

How often should I adjust my calories?

Re‑evaluate every 4‑6 weeks. If you're losing weight too quickly (>1% per week), increase calories slightly. If you're not seeing visual changes or strength gains, decrease by 100‑150 calories.

What about carbs and fats?

After setting protein, allocate remaining calories between carbs and fats based on preference. A common split is 25‑30% of calories from fat, with the rest from carbs to fuel performance.

Is cardio necessary for recomposition?

Cardio is not required but can help create a calorie deficit and improve cardiovascular health. Prioritize resistance training, and add 2‑3 sessions of low‑intensity cardio or HIIT per week if desired.

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