Total Daily Energy Expenditure (TDEE) & Macro Planner
Total Daily Energy Expenditure (TDEE) Calculator computes your total daily caloric burn by combining your basal metabolic rate with physical activity level (PAL) multipliers and the thermic effect of food. Built on validated exercise physiology equations, it provides actionable calorie and macronutrient targets directly within browser memory.
Users input biological sex, age, height, weight, and select from standardized activity profiles: Sedentary (office worker, multiplier 1.2), Lightly Active (1-3 days exercise, 1.375), Moderately Active (3-5 days moderate training, 1.55), Very Active (6-7 days intense sports, 1.725), and Athlete/Laborer (twice daily heavy labor, 1.9). The results panel delivers specific caloric targets for Maintenance, Fat Loss (-500 kcal/day for ~0.5kg/week loss), and Muscle Gain (+300 to +500 kcal/day), complete with protein, carbohydrate, and fat macro breakdowns.
Concrete Scenario: A 28-year-old female weighing 65 kg at 165 cm height works an office desk job but trains at the gym 4 days a week (Moderately Active). Her BMR of 1,380 kcal multiplied by 1.55 yields a maintenance TDEE of 2,139 kcal/day. For steady fat loss, the planner recommends 1,639 kcal/day with 125g protein (30%), 160g carbs (40%), and 55g fats (30%).
Because biometric calculations, macro splits, and caloric targets operate entirely inside client JavaScript, your personal health goals and body metrics remain private on your computer.
Best Practices & Essential Guidelines
- Avoid overestimating daily activity; most individuals with desk jobs who exercise 3-4 hours per week fall under 'Lightly Active' or 'Moderately Active'.
- Aim for a moderate calorie deficit of 400 to 500 kcal per day to promote steady body fat loss while preserving lean muscle mass.
- Maintain dietary protein intake around 1.6 to 2.2 grams per kilogram of body weight during caloric restriction to support muscle retention.
- Track average weekly body weight changes over 2 to 3 weeks and adjust calorie targets by +/- 100-150 kcal based on real-world scale trends.
