Body Recomposition Calculator (Build Muscle & Lose Fat)
Calculate daily calories, macro splits, and monthly muscle growth versus fat loss rates for simultaneous body recomposition.
Calculated Results
Frequently Asked Questions
Can you really build muscle and lose fat at the same time?
Yes. Decades of sports science confirm that 'body recomposition' occurs regularly in: 1. Untrained beginners ('newbie gains'). 2. Previously trained individuals returning after a layoff ('muscle memory'). 3. Overweight individuals with high body fat (>20% men, >30% women) who can draw energy from stored adipose tissue.
Why does the scale not change during body recomposition?
Because muscle is approximately 18% denser than adipose fat tissue by volume, gaining 5 pounds of dense muscle while losing 5 pounds of fluffy fat leaves your scale weight identical, but your waist circumference shrinks noticeably and muscle definition emerges.
What is the most critical dietary rule for recomposition?
High dietary protein is mandatory (1.0 to 1.2 grams per pound of bodyweight). Combined with progressive overload resistance training, high protein stimulates muscle protein synthesis even in a modest caloric deficit.
Should advanced lifters attempt body recomposition?
For advanced lifters within 10% of their genetic muscular potential, body recomposition is extremely slow. Dedicated cycles of slight caloric surpluses (lean bulking) and moderate deficits (cutting) yield faster measurable progress.