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Caloric Surplus Calculator

Daily surplus needed to gain muscle at target rate

Caloric Surplus Calculator

Your TDEE (maintenance calories)
Muscle Gain Rate

A caloric surplus calculator determines how many calories above your maintenance level (TDEE) to eat for muscle growth. A surplus is required to provide energy for building new muscle tissue.

  1. 1Surplus = Target Calories − TDEE (Total Daily Energy Expenditure)
  2. 2Slow gain: +200 kcal/day → ~0.5kg/month lean mass
  3. 3Moderate: +350 kcal/day → ~0.75–1kg/month
  4. 4Fast: +500 kcal/day → ~1–1.5kg/month (more fat gain too)
  5. 57,700 kcal = approximately 1 kg of body mass
TDEE 2,500, slow gain=Eat 2,700 kcal/day → ~0.5kg/month
TDEE 3,000, moderate gain=Eat 3,350 kcal/day
TDEE 2,200, aggressive gain=Eat 2,700 kcal/day → ~1kg/month
SurplusNameMonthly GainFat Gain Risk
+100–200Slow / Lean bulk~0.25–0.5 kgMinimal
+300–400Moderate bulk~0.75–1 kgLow
+500Aggressive bulk~1–1.5 kgModerate
+700+Dirty bulk~2+ kgHigh
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