පරීක්ෂා කරන්න
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Muscle Gain

Caloric Surplus Calculator

Find your optimal surplus for lean muscle gains without excessive fat

Medical Reviewer
වෛද්‍ය තහවුරු කිරීම:
Dr. Priya Sammni, MBBS, DFM
යාවත්කාලීන කළේ: Mar 2026

❓ Frequently Asked Questions

How big should a calorie surplus be?
A "lean bulk" surplus is typically 200–300 kcal/day above TDEE. Aggressive bulk is 500+ kcal/day but gains more fat. Research suggests natural athletes build muscle optimally at 0.25–0.5kg gain per week, which corresponds to roughly 250–500 kcal surplus.
Will I gain fat on a surplus?
Yes, some fat gain is inevitable when bulking, but the ratio can be controlled. A smaller, controlled surplus (200–300 kcal) combined with progressive resistance training minimises fat gain while still supporting muscle growth.
How long should a bulk phase last?
Most athletes bulk for 3–6 months, then enter a "cut" (caloric deficit) phase to lose the accumulated fat. Mini-cuts of 4–8 weeks can also be incorporated to keep body fat manageable during longer bulk phases.
What if I'm not gaining weight?
If you're in a calculated surplus but not gaining weight, you may be underestimating your actual TDEE (which can be higher if you're very active). Try adding another 200 kcal/day and track your weight weekly.

🔗 Related Calculators

⚡ TDEE Calculator 🥗 Macro Calculator 🥩 Protein Calculator 📅 Bulking Timeline

How to Calculate Your Caloric Surplus for Muscle Gain

Building muscle requires your body to have the raw materials — primarily protein and overall energy — to synthesise new muscle tissue. This requires being in a caloric surplus: consuming more calories than you burn each day. The key is finding the "Goldilocks" surplus — enough to build muscle, but not so much that you accumulate excessive fat.

The Three Bulking Phases

  • Lean Bulk (+200–300 kcal): Slow and clean. Best for experienced athletes close to their natural limit. Minimal fat gain over 3–6 months.
  • Standard Bulk (+500 kcal): The classic approach. Good balance of strength and muscle gains for intermediate trainees.
  • Aggressive Bulk (+750+ kcal): Maximum energy for growth. Best for hardgainers or beginners. Expect some additional fat gain that will need to be cut later.

Protein is Non-Negotiable

Even in a surplus, protein drives muscle protein synthesis. Aim for 1.6–2.2g of protein per kg of body weight daily. Without adequate protein, your surplus will just be stored as fat.

Track Your Progress Weekly

Weigh yourself every morning after using the bathroom. Take a 7-day rolling average. Aim for an upward trend of about 0.25–0.5kg per week on a standard bulk. If weight isn't moving after 2 weeks, add 100–200 kcal and recheck.

⚕️ Medical Disclaimer: This calculator provides estimates based on population-level data. Athletes with endocrine conditions, very high or low body fat, or specific health goals should consult a registered dietitian.

📚 විද්‍යාත්මක මූලාශ්‍ර සහ සමීකරණ

  • ආහාර හා කෘෂිකර්ම සංවිධානය (FAO)/ලෝක සෞඛ්‍ය සංවිධානය (WHO). සාර්ව පෝෂක අවශ්‍යතා සමීකරණ (2001).
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