Body Recomposition Calculator

Get your optimal calorie and macro targets for losing fat and building muscle at the same time.

Body recomposition — side-by-side before-after silhouette

Frequently Asked Questions

Body recomposition (recomp) is the process of simultaneously losing body fat while gaining lean muscle mass. Unlike traditional cut/bulk cycles, recomp maintains a small calorie deficit or near-maintenance intake with high protein to support muscle protein synthesis while burning fat. It works best for beginners, overweight individuals, and those returning to training after a break.
Body recomposition requires 2.2-2.6 g of protein per kg of body weight — higher than standard recommendations. High protein serves three critical purposes during recomp: it maximizes muscle protein synthesis for growth, preserves existing muscle mass during the calorie deficit, and increases satiety to help maintain the slight deficit. Research by Helms et al. (2014) supports this range for lean mass retention.
Yes, but it is most effective for specific populations: beginners (within 1-2 years of starting), individuals with higher body fat percentages (above 15-20% for men, 25-30% for women), people returning after a training break (muscle memory), and those on performance-enhancing drugs. Advanced, lean trainees gain muscle very slowly and may benefit more from traditional cut/bulk cycles.
Body recomp is a slower process than dedicated cutting or bulking. Expect visible changes over 3-6 months, with measurable improvements in body composition by 8-12 weeks. The scale may not change much — track progress with measurements, progress photos, and strength gains rather than body weight alone.
Resistance training 3-5 days per week with progressive overload is essential. Focus on compound movements (squat, deadlift, bench, rows) with moderate volume (10-20 sets per muscle group per week). Keep cardio moderate — 2-3 sessions of 20-30 minutes. Excessive cardio can interfere with muscle recovery and growth during a recomp.
A small deficit of 10-15% below maintenance is ideal for most people doing a recomp — large enough to lose fat, small enough to still fuel muscle growth and recovery. Some lifters with higher body fat use a slightly larger deficit; very lean or advanced trainees often sit at maintenance or even a tiny surplus and let high protein plus progressive overload drive the recomp. Calculate your maintenance first with a TDEE calculator, then subtract 10-15%.
Often not much, and that is the point. Because you are losing fat and adding muscle at roughly similar rates, body weight can stay nearly flat for weeks even as your body visibly changes. This is why the scale is the worst single tool for tracking a recomp. Use progress photos, a tape measure (waist, hips, arms, thighs), strength in the gym, and how your clothes fit instead.
Slower than a dedicated bulk. A beginner might gain 0.5-1 kg (1-2 lb) of muscle per month early on while also losing fat; an intermediate lifter perhaps 0.2-0.4 kg per month; advanced trainees very little. Fat loss tends to be the more visible change month to month. Recomp trades speed for the benefit of not having to gain extra fat in a bulk and then diet it back off.
It depends on your training age and goals. For beginners, returning lifters, and people above ~15-20% body fat (men) or ~25-30% (women), recomp is usually the better, less stressful path — you improve composition without big weight swings. For lean, advanced lifters chasing maximum size, alternating a controlled bulk and cut is typically faster because dedicated surpluses drive more muscle growth than a deficit or maintenance recomp can.

Related Calculators

TDEE Calculator Macro Calculator Protein Calculator Muscle Gain Potential Calculator

Recomp vs. Cut/Bulk

Body recomposition is ideal for beginners and those with higher body fat. Advanced lifters near their genetic ceiling may see faster results with traditional bulk/cut cycles, where they alternate between a calorie surplus for muscle gain and a deficit for fat loss. Check your natural muscle gain potential to set realistic recomp expectations.

Last updated: June 2026

How body recomposition actually works

Body recomposition means changing the ratio of fat to muscle on your frame — losing fat and gaining muscle at the same time — instead of just losing “weight.” It runs on three levers working together: a small calorie deficit or near-maintenance intake so your body taps fat stores for energy, high protein so it builds and protects muscle, and a progressive resistance-training stimulus that tells your body the muscle is worth keeping and growing. Remove any one of the three and recomp stalls: too big a deficit and you lose muscle with the fat; too little protein and you can't build; no training stimulus and the deficit just makes you a smaller version of the same shape.

Who body recomp works best for

Recomp is not equally effective for everyone. It works fastest and most reliably for:

  • Beginners in their first 1-2 years of training, when “newbie gains” let muscle grow even in a deficit.
  • People returning after a break, who regain lost muscle quickly via muscle memory.
  • Those with higher body fat (roughly above 15-20% for men, 25-30% for women), who have ample stored energy to fuel muscle growth while fat drops. Check your body-fat percentage and where you sit on the BMI chart to gauge your starting point.

Lean, advanced lifters near their genetic ceiling gain muscle very slowly and usually progress faster with alternating bulk and cut cycles. Recomp trades speed for the convenience of never having to gain — then diet off — extra fat.

Setting your numbers

The calculator above does this for you, but here is the logic so you can sanity-check it:

  • Calories: start from your maintenance (your TDEE) and take a modest 10-15% deficit. Higher body fat can support a slightly larger deficit; lean trainees often sit at maintenance.
  • Protein: 1.8-2.6 g per kg of body weight (roughly 0.8-1.2 g per lb). This is the single most important macro for recomp — it drives muscle protein synthesis and protects existing muscle in the deficit. Dial it in with the protein calculator.
  • Fat and carbs: fill the remaining calories — fat around 0.6-1 g/kg for hormones, the rest as carbs to fuel training. The macro calculator splits this for you.
  • Training: resistance train 3-5 days/week with progressive overload on compound lifts; keep cardio moderate so it doesn't eat into recovery.

A realistic timeline — and how to track it

Recomp is slow by design. Expect measurable composition changes by 8-12 weeks and clearly visible ones over 3-6 months. The catch that frustrates most people: the scale barely moves, because you're losing fat and adding muscle at similar rates. That's success, not failure — but it means the scale is the worst tool to judge a recomp. Track instead with:

  • Progress photos every 2-4 weeks in the same lighting and pose.
  • A tape measure at the waist, hips, arms, and thighs.
  • Strength in the gym — going up in reps or load is a direct signal you're building muscle.
  • How your clothes fit.

Common mistakes that stall a recomp

  • Too large a deficit. Aggressive dieting burns muscle alongside fat and kills training performance. Keep it modest.
  • Under-eating protein. The most common reason recomps fail to build any muscle.
  • Chasing the scale. Quitting because body weight didn't drop, when composition was actually improving.
  • Too much cardio, not enough lifting. Cardio supports the deficit but the resistance stimulus is what preserves and grows muscle.
  • Impatience. Recomp rewards consistency over months; people often abandon it right before the visible payoff.

When you've got your targets, the rest is consistency: hit your calories and protein most days, add a little to the bar over time, and judge progress by the mirror and the tape, not the scale. Re-run the calculator whenever your weight changes by a few kilos to keep your numbers current.