Fitness Tool

Body Recomposition Calculator - Body Recomp Calculator & Macro Calculator

Free body recomposition calculator & body recomp calculator. Calculate your body recomposition plan with precise macros, calorie targets, and timeline for losing fat while building muscle. Our calculator uses the Mifflin-St Jeor equation to determine your BMR and TDEE, then provides personalized nutrition recommendations for optimal body recomp results.

Last updated: December 15, 2024

Personalized macro calculations (protein, carbs, fats)
Science-backed calorie targets for fat loss and muscle gain
Realistic timeline estimates with safe progression rates

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Body Recomposition Calculator
Calculate your body recomposition plan with precise macros and timeline

Use a body fat scale, calipers, or visual estimation

Your Recomp Plan

Current Phase

Lean Gains

Difficulty: Moderate

Current Body Composition

Lean Mass

64 kg

Fat Mass

16 kg

BMR

1780 cal

TDEE

2759 cal

Target Goals

Target Body Fat:12%
Target Weight:73.6 kg

Daily Nutrition Target

Calories:2459

Protein

141g

Carbs

321g

Fats

68g

Estimated Timeline

3 months

(13 weeks)

Lose 0.5-1kg (1-2 lbs) per week

Personalized Recommendations:

  • Excellent protein intake at 141g per day
  • Focus on progressive overload in strength training
  • Track progress with photos and measurements, not just scale weight
  • Ensure adequate sleep (7-9 hours) for optimal recovery
  • Stay hydrated: aim for 3-4 liters of water daily

Body Recomposition Calculator Features & Tools

Body Recomp Calculator
Complete body recomposition planning with timeline estimates

Calculations included

BMR, TDEE, Macros, Timeline

All-in-one calculator for complete body recomposition planning

Macro Calculator Body Recomposition
Precise protein, carbs, and fats for body recomp goals

Daily targets

P/C/F Grams

Optimized macronutrient split for simultaneous fat loss and muscle gain

TDEE Calculator
Calculate Total Daily Energy Expenditure for accurate calorie targets

Energy expenditure

Daily Calories

Accounts for activity level to determine maintenance calories

Body Fat Calculator
Track body composition changes during recomposition phase

Composition breakdown

Lean vs Fat Mass

Monitor changes in lean muscle mass and body fat percentage

Cutting Calculator
Plan aggressive fat loss phases while preserving muscle

Deficit calculation

500-750 cal below TDEE

Optimized for rapid fat loss with muscle preservation strategies

Lean Bulk Calculator
Build muscle with minimal fat gain through controlled surplus

Surplus calculation

200-300 cal above TDEE

Maximize muscle gain while minimizing fat accumulation

Quick Example Result

For 80kg, 180cm, 30-year-old male at 20% body fat (moderate activity):

Daily Calories

2459 cal

Protein Target

141g

How Our Body Recomposition Calculator Works

Our body recomposition calculator uses the scientifically validated Mifflin-St Jeor equation to calculate your Basal Metabolic Rate (BMR), then applies activity multipliers to determine Total Daily Energy Expenditure (TDEE). The calculator then creates a personalized nutrition plan optimized for simultaneous fat loss and muscle building based on your specific goals.

The Mifflin-St Jeor Equation

For Men: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age) + 5For Women: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age) - 161

This equation is considered the gold standard for BMR calculation, showing the highest accuracy in predicting resting metabolic rate. TDEE is then calculated by multiplying BMR by your activity level factor (1.2 to 1.9).

Body Recomposition Principles

Body recomposition works by maintaining a small caloric deficit (200-300 calories) or eating at maintenance while consuming high protein (1.6-2.2g per kg body weight) and following progressive resistance training. This allows your body to simultaneously lose fat through the caloric deficit while building muscle through adequate protein and training stimulus.

  • High protein intake (30-40% of calories) supports muscle protein synthesis
  • Moderate caloric deficit or maintenance prevents muscle loss
  • Progressive overload training provides stimulus for muscle growth
  • Adequate sleep and recovery allow for tissue repair and adaptation
  • Consistent adherence over 3-6 months yields visible results
  • Works best for beginners and those with higher body fat percentages

Sources & References

  • Mifflin-St Jeor Equation - American Journal of Clinical Nutrition (1990)Most accurate BMR calculation formula validated through research
  • International Society of Sports Nutrition - Position Stand on Protein and ExerciseEvidence-based protein recommendations for muscle building and body recomposition
  • Examine.com - Body Recomposition Research DatabaseComprehensive research analysis on body recomposition strategies

Need help with nutrition planning? Check out our Chipotle macro calculator and dunk calculator.

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Body Recomposition Calculator Examples

Body Recomp Calculator Example
Calculate body recomposition plan for 80kg male at 20% body fat

Starting Stats:

  • Weight: 80 kg (176 lbs)
  • Body Fat: 20%
  • Lean Mass: 64 kg
  • Fat Mass: 16 kg
  • TDEE: 2,480 calories

Recomp Plan:

  1. Target body fat: 12%
  2. Calorie target: 2,180 cal (-300 deficit)
  3. Protein: 141g (1.76g per kg)
  4. Carbs: 245g, Fats: 61g
  5. Estimated timeline: 4-5 months

Result: Lean Gains Phase - Moderate Difficulty

Lose 8% body fat while maintaining lean muscle mass over 16-20 weeks.

Beginner Recomp Example

Starting: 25% body fat, sedentary

Best candidate for rapid body recomposition

Advanced Cut Example

Starting: 15% body fat, very active

Slower progress, requires precision nutrition

Frequently Asked Questions

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