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
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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
Daily Nutrition Target
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
Calculations included
BMR, TDEE, Macros, Timeline
All-in-one calculator for complete body recomposition planning
Daily targets
P/C/F Grams
Optimized macronutrient split for simultaneous fat loss and muscle gain
Energy expenditure
Daily Calories
Accounts for activity level to determine maintenance calories
Composition breakdown
Lean vs Fat Mass
Monitor changes in lean muscle mass and body fat percentage
Deficit calculation
500-750 cal below TDEE
Optimized for rapid fat loss with muscle preservation strategies
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) - 161This 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.
Get Custom Calculator for Your PlatformBody Recomposition Calculator Examples
Starting Stats:
- Weight: 80 kg (176 lbs)
- Body Fat: 20%
- Lean Mass: 64 kg
- Fat Mass: 16 kg
- TDEE: 2,480 calories
Recomp Plan:
- Target body fat: 12%
- Calorie target: 2,180 cal (-300 deficit)
- Protein: 141g (1.76g per kg)
- Carbs: 245g, Fats: 61g
- 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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