Use this free body recomposition calculator to estimate daily calories and macros for losing fat while building or preserving lean muscle. Enter your stats, activity level, and training experience to get a practical starting target.
Note: This calculator gives evidence-based estimates (not medical advice). Adjust every 2-3 weeks based on progress, photos, strength, and recovery.
What is body recomposition?
Body recomposition means reducing body fat while increasing or maintaining lean muscle mass at the same time. Unlike classic “bulk then cut” phases, recomposition focuses on improving body composition directly. Scale weight may move slowly, but visual and performance changes can be significant.
How this calculator works
1) Basal metabolism and maintenance calories
The calculator estimates BMR using the Mifflin-St Jeor equation, then multiplies by activity to estimate TDEE (maintenance calories).
- BMR: calories your body burns at rest
- TDEE: total daily energy expenditure including movement and training
2) Recomposition calorie strategy
Your calorie target is adjusted based on body fat percentage (if provided):
- Higher body fat: modest deficit to prioritize fat loss
- Moderate body fat: mild deficit or maintenance
- Lower body fat: maintenance or slight surplus to support muscle gain
3) Macro targets
Protein is set relatively high because it supports muscle protein synthesis, satiety, and recovery during recomposition. Fats are kept at a healthy minimum for hormones, and carbs fill the remaining calories to support training performance.
How to use your results
- Hit your calorie target within about ±100 kcal per day.
- Prioritize protein consistency first, then total calories.
- Lift 3-5 days per week with progressive overload.
- Track weekly averages (weight, waist, lifts, photos), not single-day fluctuations.
- If progress stalls for 2-3 weeks, adjust calories by 100-150 kcal.
Best training setup for recomposition
Strength training
Center your plan around compound movements (squat, hinge, push, pull, carry). Aim to progress reps, load, or sets over time while keeping technique clean.
Cardio and steps
Use moderate cardio and daily steps to improve health and help energy balance without excessive fatigue. A practical target for many people is 7,000-10,000 steps per day.
Recovery
Sleep 7-9 hours nightly and manage stress. Poor recovery reduces training quality and can make fat loss and muscle gain much harder.
Common mistakes to avoid
- Changing calories too aggressively week-to-week
- Undereating protein
- Skipping progressive overload
- Judging progress only by scale weight
- Ignoring sleep and stress management
FAQ
Can beginners recomp faster?
Yes. Beginners, people returning after a break, and individuals with higher body fat usually see faster recomposition progress.
Do I need perfect macros?
No. Total calories and protein are usually the most important. Carb and fat split can vary based on preference and training performance.
How long does recomposition take?
Meaningful changes usually require months, not days. Think in 8-12 week blocks and evaluate trends in measurements, photos, and gym performance.
Final note
This calculator gives a strong starting point for calorie deficit planning, macro calculation, and lean muscle support. Consistency beats perfection—follow your numbers, train hard, recover well, and adjust based on real-world feedback.