💪 Muscle Gain Calorie Calculator
Calories needed to maximize muscle growth
Written by Albert Mateos · Founder & Editor
Last reviewed: May 2, 2026
How it works
Calculate how many calories and protein you need to maximize muscle growth based on your training experience. Uses the McDonald model to estimate your realistic monthly muscle gain potential. Tailored recommendations for beginners through advanced lifters.
How to Use This Calculator
- Enter your weight, height, age, sex, and activity level.
- Review your TDEE and recommended calorie surplus.
- See your daily protein target (g/kg lean body mass or body weight).
- Adjust macros to hit surplus without excess fat gain.
Example
Inputs: 22-year-old male, 70 kg, 178 cm, active (trains 4x/week)
Result: TDEE: 2,900 kcal — Muscle gain: 3,150 kcal, Protein: 140 g
What it means: A 250 kcal surplus with 140 g protein daily supports ~0.25 kg/week of predominantly lean tissue gain.
Tips
- Natural lifters typically gain 0.5-1 kg of muscle per month at most — patience matters.
- A caloric surplus doesn't build muscle on its own — progressive overload in the gym does.
- Split protein across 4-5 meals of 30-40 g each for optimal muscle protein synthesis.
- Sleep 7-9 hours — recovery is where muscle is actually built, not in the gym.
Disclaimer: This calculator is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider.
Learn More
Frequently Asked Questions
- How many calories above maintenance do I need to build muscle?
- A surplus of 250-500 calories above your total daily energy expenditure provides enough energy to support muscle growth without excessive fat gain. The exact amount depends on your training experience: beginners benefit from slightly higher surpluses while advanced lifters should stay conservative. Pairing this surplus with a structured resistance training program and adequate protein is essential.
- How much protein do I need for muscle growth?
- The current evidence supports 1.6-2.2 grams of protein per kilogram of body weight per day for maximizing muscle protein synthesis. Going above 2.2 g/kg has not been shown to provide additional muscle-building benefits for most people. Distribute your protein across 3-5 meals, aiming for at least 20-40 grams per serving to optimally stimulate muscle repair and growth.
- Can I build muscle without gaining any fat?
- Building muscle with zero fat gain is extremely difficult outside of specific scenarios like untrained beginners, people returning after a layoff, or those with higher body fat percentages. These groups can experience body recomposition, gaining muscle while losing fat near maintenance calories. For most trained individuals, a small calorie surplus is needed and some minor fat gain is expected.