This Calorie Surplus Calculator helps you estimate how many calories you need each day to gain weight or build muscle in a controlled way. By calculating your maintenance calories and adding a planned surplus, it gives you clear targets for daily intake and expected weight gain—so you can bulk with precision instead of guesswork.
Gaining healthy weight or building lean muscle is not about eating randomly—it requires a calculated calorie surplus. A calorie surplus means consuming more calories than your body burns daily, allowing your body to gain weight over time.
All calculations are based on scientifically accepted formulas used by nutritionists and fitness professionals.
A calorie surplus occurs when your daily calorie intake exceeds your Total Daily Energy Expenditure (TDEE).
If your body burns 2,500 calories per day and you consume 3,000 calories, your surplus is 500 kcal/day.
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