GetHealthyCalculators
Skip to content

Body Recomposition Calculator

Body recomposition — losing fat while simultaneously gaining muscle — is one of the most sought-after outcomes in fitness. Unlike traditional bulk/cut cycles, recomposition uses calorie cycling to create a modest surplus on training days (to support muscle growth) and a moderate deficit on rest days (to encourage fat loss). Progress is slower than a dedicated bulk or cut, but you maintain aesthetic progress throughout and avoid major weight swings.

Quick Answer

For body recomp, eat at TDEE +200 kcal on training days and TDEE −300 kcal on rest days. Aim for 0.7–1.0 g of protein per pound of bodyweight daily.

These results are estimates based on general formulas and are not a substitute for professional medical advice. Consult a healthcare provider before making health decisions.

Enter your details to calculate your recomposition targets.

How the Formula Works

  1. Calculate your TDEE using the Mifflin-St Jeor equation and activity multiplier.

    TDEE = BMR × Activity Multiplier

  2. Set a slight caloric surplus on training days to fuel muscle protein synthesis.

    Training Day = TDEE + 200 kcal

  3. Set a moderate deficit on rest days to encourage fat oxidation.

    Rest Day = TDEE − 300 kcal

  4. Calculate weekly average calories and estimated fat loss from the net weekly deficit.

    Weekly Average = (4 × Training + 3 × Rest) / 7 | Fat Loss = Weekly Deficit / 3500

Methodology & Sources

Reviewed and updated April 4, 2026 · Prepared by GetHealthyCalculators Editorial Team

Calorie cycling values are based on research-supported thresholds: a +200 kcal surplus is sufficient for muscle protein synthesis without excessive fat gain, while a −300 kcal deficit supports fat oxidation without compromising recovery. Protein targets use the research-backed 1.0 g/lb benchmark.

References

  • Evidence-based recommendations for natural bodybuilding contest preparation · Journal of the International Society of Sports Nutrition
  • Body recomposition: Can trained individuals build muscle and lose fat simultaneously? · Strength and Conditioning Journal
  • Dietary protein and muscle mass: Translating science to application and health benefit · Nutrients

Limitations

  • This calculator uses estimated TDEE which may differ from your actual energy expenditure by 10–20%.
  • Body recomposition is a slow process — meaningful changes typically require 3–6 months of consistent training and nutrition.
  • The formula does not account for training experience — advanced athletes may struggle to gain muscle in a caloric deficit.
  • Estimated weekly fat loss assumes all deficit comes from fat; in practice, some comes from glycogen and water.

Frequently Asked Questions

What is body recomposition?
Body recomposition refers to simultaneously reducing body fat and increasing lean muscle mass. Instead of gaining weight to build muscle (bulk) and then dieting to lose fat (cut), recomposition aims to do both at once through calorie cycling and high protein intake.
Is body recomposition possible for everyone?
It is most effective for beginners who have not trained seriously before, individuals returning from a long break, or those with significant fat reserves. Advanced, lean athletes with years of training will find simultaneous muscle gain and fat loss increasingly difficult and may benefit more from traditional bulk/cut phases.
Why is protein so important for body recomposition?
Protein provides the amino acids needed for muscle protein synthesis (MPS) — the process of building new muscle tissue. A high protein intake (0.7–1.0 g per lb of bodyweight) also helps preserve lean mass during the caloric deficit on rest days and has the highest thermic effect of any macronutrient, meaning more of its calories are burned during digestion.
How does calorie cycling work for body recomp?
On training days, a small caloric surplus provides energy and nutrients for muscle repair and growth. On rest days, a moderate deficit puts the body in fat-burning mode without undermining recovery. The net weekly deficit is typically small enough to prevent muscle loss while still driving fat reduction over time.
How long does body recomposition take?
Most people can expect to notice measurable changes in body composition after 8–12 weeks of consistent training and adherence to calorie targets. Significant recomposition usually takes 6–12 months. Progress is assessed better by measuring body fat percentage and muscle circumference than by scale weight alone.

Calculate your daily protein requirements

Protein Intake Calculator

Related Calculators

TDEE Calculator

Estimate your Total Daily Energy Expenditure based on activity level.

Calculate

Protein Intake Calculator

Calculate your daily protein requirements based on weight and activity.

Calculate

Calorie Calculator

Find your daily calorie goal for weight loss, maintenance, or gain.

Calculate

More on This Topic

LiftProof · Tool

Body Recomp Calculator

Plan your body recomposition with calorie and macro targets for simultaneous fat loss and muscle gain.

Read more

Prova · Guide

Protein Optimization: How Much Protein Men Actually Need

Research-backed protein recommendations for men based on activity level and goals.

Read more