Plan simultaneous fat loss and muscle gain with calorie and protein targets. Estimate body composition changes over 12-24 weeks of recomposition.
Body recomposition means trying to lose fat while gaining or at least preserving lean mass at the same time. It is usually a slower process than a dedicated cut or bulk, but it can be a practical approach for beginners, people returning to training, and some higher-body-fat lifters.
The usual setup is maintenance calories or a small deficit, high protein intake, and progressive resistance training. This calculator estimates calorie and macro targets from that approach and shows how body-composition change may progress over time.
Use it to compare whether a recomp-style plan fits your current situation better than a traditional bulk or cut.
This worksheet is useful when the scale is not the only goal and you care more about fat loss with muscle retention or gradual muscle gain. It gives a structured starting point for calories and protein while making it easier to decide whether recomp is realistic for your training stage.
TDEE = BMR (Mifflin-St Jeor) × Activity Factor Recomp Calories = TDEE × 0.90 to 1.00 (slight deficit to maintenance) Protein Target = 1.0–1.2 g per pound of body weight Projected weekly changes: • Fat loss: 0.25–0.5 lb/week (at slight deficit with high protein) • Muscle gain: 0.12–0.25 lb/week (higher for beginners) Recomp suitability score based on: training status, body fat %, age, and deficit tolerance
Result: ~2,400 kcal/day, 180g protein
A 180 lb male at 22% body fat with beginner training status is a plausible recomp candidate. TDEE is ~2,600 kcal. Recomp target: ~2,400 kcal (slight 200 kcal deficit). Protein: 180g (1 g/lb). Over 12 weeks, that can produce modest fat loss with some lean-mass gain or preservation depending on training quality and adherence.
Recomposition works because muscle protein synthesis (MPS) and fat oxidation are not purely opposing processes. While a calorie deficit reduces some anabolic signaling, resistance training and high protein intake can still support lean-mass preservation or modest gain, especially in people who are beginners or detrained.
Some protocols cycle calories: eating slightly above maintenance on training days and below maintenance on rest days. This provides extra fuel for workouts and recovery while keeping the weekly average near maintenance. While the evidence for calorie cycling is limited, it can be a practical planning strategy.
Recomp is a starting strategy, not an indefinite approach. Once beginner or detrained advantages fade, progress slows. At that point, alternating lean-bulk and mini-cut phases is generally more effective for continued physique development.
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This page estimates a maintenance-based calorie target, then applies a small deficit or near-maintenance range to model recomposition. It uses the entered body-fat estimate, training experience, and activity level to set a conservative protein target and to project a slow, worksheet-style change in fat mass and lean mass. The output is intended as an educational planning tool, not a promise that fat loss and muscle gain will occur in exactly the projected amounts.
Yes, but with caveats. Research supports recomposition most strongly in untrained individuals beginning resistance training, trained individuals returning after a layoff, and overweight individuals using adequate protein and resistance exercise. The effect is strongest in beginners and diminishes with training experience.
Visible recomp results typically take 8–16 weeks. The scale may not move much, making it psychologically challenging. After 12–24 weeks, many people benefit from transitioning to a dedicated cut or lean bulk if progress slows.
A slight deficit (5–15% below TDEE) generally produces better recomp results than strict maintenance for people who want fat loss. Too large a deficit shifts the balance toward net muscle loss. The sweet spot is usually a small deficit or near-maintenance intake.
Protein helps maximize muscle protein synthesis and preserve lean mass during a deficit. It also tends to improve satiety, which makes it easier to stay near the intended calorie target.
Track waist circumference, progress photos, strength gains, clothing fit, and body-fat estimates. A successful recomp may show only small scale movement but a meaningful change in appearance and measurements.
Recomp is not ideal for people who are already quite lean and want faster muscle gain, advanced lifters who have already captured most beginner gains, or anyone with a specific weight-class deadline. Those people usually do better with a dedicated cut or lean bulk.