Calorie Surplus Calculator
Bulking is not "eat as much as possible." Muscle can only be built so fast, and extra calories beyond that rate mostly become fat. Enter your details below for a surplus sized to your training experience, and see the full reasoning in the calorie surplus guide.
Your details
Activity level
Training experience
Maintenance (TDEE)
2678 kcal
Surplus calorie target
2880-2980 kcal
Protein target to support muscle growth: about 145g/day.
How Big Should a Surplus Be?
The right surplus depends heavily on training experience, since muscle-building speed drops off sharply as you get more advanced:
- Beginner (under 1 year training): 300-500 kcal above TDEE
- Intermediate (1-3 years): 200-300 kcal above TDEE
- Advanced (3+ years): 100-200 kcal above TDEE
Why Not Just Eat More to Be Safe?
A bigger surplus does not build muscle faster past a certain point, your body can only build new tissue at a limited rate, driven mostly by training stimulus and recovery, not by extra calories. Calories beyond what muscle-building actually requires get stored as fat, so an oversized surplus mostly just adds a faster-growing waistline with the same muscle gain you would have gotten from a smaller one.
What About Protein During a Surplus?
Protein needs during a surplus are similar to general training needs, 1.6-2.2 g/kg of body weight, lower than the elevated targets needed during a cut, since you are not fighting a deficit. Carbs and fat can fill out the rest of the surplus based on preference and how you perform best in training.
How to Tell If Your Surplus Is Working
Track weight weekly and look at the trend, not single days. Roughly 0.25-0.5% of body weight gained per week is a reasonable lean-bulk pace for most people; faster than that for an extended period usually means more of the gain is fat. If the scale is not moving after 2-3 weeks at your current surplus, increase it by about 100-150 kcal rather than jumping straight to a big increase.
Frequently Asked Questions
How many extra calories do I need to build muscle?
It depends on training experience: roughly 300-500 kcal above maintenance for beginners, 200-300 kcal for intermediates, and 100-200 kcal for advanced lifters, since the capacity to build new muscle shrinks with experience.
Will a bigger surplus build muscle faster?
No, not past the point your body can actually use for muscle growth. Extra calories beyond that are mostly stored as fat rather than accelerating gains.
How much weight should I gain per week on a bulk?
Roughly 0.25-0.5% of body weight per week is a reasonable lean-bulk pace for most people. Faster sustained gains usually mean a larger share is fat rather than muscle.
Do I need more protein during a surplus?
A standard training protein target of 1.6-2.2 g/kg of body weight is sufficient during a surplus, lower than the elevated range needed while cutting.
What if I am not gaining weight on my current surplus?
Give it 2-3 weeks before adjusting, since week-to-week weight swings from water and food volume are normal. If the trend is still flat after that, add about 100-150 kcal rather than a large jump.
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Scientific Sources