Reverse Aging
Reverse Aging
Science-based: Body rejuvenation and healthy longevity
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🎯 Fat Loss Planner

Your evidence-based plan in one minute: a calorie target, protein, steps and a week-by-week forecast to your goal.

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🔬 How it's calculated
  • Resting metabolic rate (BMR) uses the Mifflin-St Jeor equation, or Katch-McArdle when you enter your body-fat percentage.
  • Daily energy expenditure (TDEE) is your BMR times the activity factor you chose.
  • One kilogram of body fat is about 7,700 calories. Your daily deficit comes from that and the pace you chose.
  • Safety limits: up to 1 kg a week, a deficit of up to 1,000 calories a day and up to 30% of your TDEE. A floor of 1,200 calories for women and 1,500 for men.
  • Protein: 1.8-2.2 g per kg of reference weight, to protect muscle while you lose fat.
  • The forecast recalculates your TDEE as your weight drops, and assumes a mild metabolic slowdown (up to 5%).

⚕️ This tool gives general estimates only and is not medical advice. Your data stays on your device.