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Free Calorie Surplus Calculator
Comprehensive calorie surplus calculator with instant results, BMR/TDEE calculations, bulking macronutrient breakdown, and personalized weight gain recommendations based on training experience and goals.
Limitation: This calculator provides estimates for healthy weight gain.
Calorie Surplus Calculator
Calculate your daily calorie needs for healthy weight gain and muscle building
How to Use the Calorie Surplus Calculator
Our calorie surplus calculator uses scientifically-proven formulas to determine your optimal daily calorie intake for weight gain and muscle building. Follow these simple steps to get accurate, personalized results.
Select your preferred unit system (Metric or Imperial)
💡 Pro Tip
Start with a conservative surplus and monitor your weight gain. Aim for 0.25-0.5% of body weight gain per week for optimal muscle-to-fat ratio.
Frequently Asked Questions
Still have questions about this calculation?
Try the CalculatorFormula
The calculator applies the documented formula to the values you provide.
Formula
Medical Disclaimer
This calorie surplus calculator is for informational purposes only and is not intended to replace professional medical advice, diagnosis, or treatment. Weight gain needs vary significantly between individuals based on metabolism, genetics, health conditions, training status, and other factors. Always consult with a qualified healthcare provider, registered dietitian, or certified nutritionist before starting any weight gain program or making significant changes to your diet and exercise routine.
Sources & review
Calorie Surplus Calculator documents the references behind its formulas and assumptions. Always treat results as educational estimates, not personalized professional advice.
Last reviewed
July 21, 2026
NIH health reference
National Institutes of Health (NIH)
https://www.niddk.nih.gov/health-information/weight-management
See our methodology and corrections policy.