Body Recomposition Calculator · Lose Fat · Build Muscle · 2025

Body Recomposition Calculator — Lose Fat & Build Muscle

Free body recomposition calculator — enter your weight, body fat percentage, age, and activity level to get your personalized calories and macros for losing fat while gaining muscle. The body recomp calculator uses your TDEE and lean body mass to create a precise nutrition plan with protein, fat, and carb targets.

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Body Recomposition Calculator
Instant calculator
Your Stats

Recomp Calories
cal/day target
Protein
grams/day
Your TDEE
maintenance cals
Lean Body Mass
lbs muscle/bone
Fat (g/day)
Carbs (g/day)

What Is Body Recomposition?

Body recomposition is the process of simultaneously losing body fat while gaining lean muscle. Unlike traditional cutting (calorie deficit only) or bulking (calorie surplus only), body recomp aims to achieve both goals at once. It requires three specific conditions: a small calorie deficit, high protein intake, and progressive resistance training.

Who Body Recomposition Works Best For

ProfileRecomp EffectivenessWhy
Beginners (0-1 yr training)ExcellentNewbie gains — muscle grows rapidly regardless of small deficit
Returning after long breakExcellentMuscle memory — lost muscle rebuilds faster than new growth
Higher BF% (20%+ M / 28%+ F)Very goodFat stores provide energy for muscle building even in deficit
Intermediate (1-3 yrs)ModerateSlower gains at this stage — dedicated bulk/cut may be faster
Advanced (3+ yrs, lean)LimitedNear muscle ceiling — dedicated bulking is more efficient

Body Recomp Nutrition Targets

Body Recomp Formula

Recomp Calories = TDEE − 150 to 300 calories
Protein = 0.8 to 1.0g per lb of bodyweight
Fat = 25-35% of calories
Carbs = remaining calories

Resistance Training is Non-NegotiableBody recomposition without resistance training is just weight loss. You must provide a muscle-building stimulus through progressive lifting. Minimum: 3 days per week of compound movements (squat, bench, deadlift, rows, overhead press). Progressive overload — increasing weight or reps over time — is the key driver of muscle gain even in a slight calorie deficit.
How long does body recomposition take? +
Body recomposition is slower than dedicated cutting or bulking. Expect to lose 0.5-1 lb of fat per month while gaining 0.5-1 lb of muscle per month. After 3 months you may weigh the same but look noticeably different. After 6-12 months the transformation is typically clearly visible for consistent beginners.
What protein intake is needed for body recomposition? +
Aim for 0.8-1.0g of protein per pound of bodyweight (1.8-2.2g per kg). This is higher than the RDA but necessary to support muscle protein synthesis while in a slight calorie deficit. Protein also has the highest satiety per calorie. Distribute protein evenly across 3-4 meals for optimal muscle protein synthesis throughout the day.