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How This Calculator Works

This calculator uses the Mifflin-St Jeor equation, the most accurate formula for estimating your Total Daily Energy Expenditure (TDEE). It calculates your basal metabolic rate (BMR) — the calories you burn at rest — then adjusts for your activity level.

Understanding Your Results

  • Maintenance calories (TDEE): Eat this amount to maintain your current weight
  • Weight loss: Subtract 250-1,000 calories for safe fat loss (0.25-1 kg/week)
  • Muscle gain: Add 200-500 calories for lean muscle growth

Important Notes

  • Results are estimates based on population averages
  • Track your progress and adjust if needed after 2-3 weeks
  • Don't go below 1,200 cal/day (women) or 1,500 cal/day (men) without medical supervision
  • Prioritize whole foods and adequate protein for best results