Calorie Calculator To Gain Weight
Calculate your daily calorie needs for weight gain based on your age, gender, weight, height, and activity level. Get your target calorie intake and macronutrient breakdown.
Published by:
isCalculator Editorial Team
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How to use this tool?
This calculator estimates your daily calorie and macronutrient needs for healthy weight gain. All inputs are in metric units (kg, cm).
- Enter your details: Age (10–120 years), Gender, Weight (20–500 kg), Height (50–300 cm).
- Select your activity level: Choose the option that best matches your weekly exercise routine.
- Choose your weight gain goal: Mild (0.25 kg/week), Moderate (0.5 kg/week), or Aggressive (0.75 kg/week).
- Click "Calculate" to see your results.
Results explained:
- Daily Calorie Target: Your total calories needed, including a surplus for gain.
- Protein, Carbs, Fat: Recommended grams per day based on a 30/50/20% split.
- Formula note: Uses Mifflin-St Jeor BMR × activity factor + ~1100 kcal per 0.5 kg gain per week.
Previous Results
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Frequently Asked Questions
It calculates your Basal Metabolic Rate (BMR) using the Mifflin-St Jeor equation, then multiplies by your activity level to get Total Daily Energy Expenditure (TDEE). A calorie surplus is added based on your weight gain goal (e.g., 500 kcal/day for 0.5 kg/week).
The calculator uses a 30% protein, 50% carbohydrates, and 20% fat split, which is common for muscle gain. Adjust based on personal preference.
It provides an estimate. Individual needs vary. Consult a healthcare professional before starting any diet or exercise program.
