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    TDEE Explained: The Science of Calories for Weight Management

    Understanding your Total Daily Energy Expenditure is the foundation of any successful diet. Here's how to calculate and use it.

    AI Calculator SuiteJanuary 20, 20256 min read

    What is TDEE?

    Total Daily Energy Expenditure (TDEE) is the total number of calories you burn each day. It's the sum of:

  1. BMR (Basal Metabolic Rate) – Calories burned at rest
  2. TEF (Thermic Effect of Food) – Calories burned digesting food
  3. NEAT (Non-Exercise Activity Thermogenesis) – Daily movement
  4. EAT (Exercise Activity Thermogenesis) – Intentional exercise
  5. Calculating Your TDEE

    Step 1: Calculate BMR

    The Mifflin-St Jeor equation is most accurate:

    Men: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age) + 5

    Women: BMR = (10 × weight in kg) + (6.25 × height in cm) - (5 × age) - 161

    Step 2: Apply Activity Multiplier

    Activity LevelMultiplier
    Sedentary (desk job)BMR × 1.2
    Light activity (1-2 days/week)BMR × 1.375
    Moderate (3-5 days/week)BMR × 1.55
    Very active (6-7 days/week)BMR × 1.725
    Extremely active (athlete)BMR × 1.9

    Using TDEE for Goals

    For Weight Loss:

    Create a deficit of 300-500 calories below TDEE

  6. 500 cal/day deficit = ~1 lb/week loss
  7. Don't go below BMR
  8. For Muscle Gain:

    Create a surplus of 200-300 calories above TDEE

  9. Combine with resistance training
  10. Prioritize protein intake
  11. For Maintenance:

    Eat at your TDEE level

    Common Mistakes

  12. Overestimating activity level – Be honest about your exercise
  13. Not adjusting over time – Recalculate as weight changes
  14. Ignoring NEAT – Walking more can burn 200-500 extra calories
  15. Weekend overeating – One bad day can erase a week's deficit
  16. Track and Adjust

    TDEE calculations are estimates. Track your weight for 2-3 weeks and adjust:

  17. Losing too fast? Add 100-200 calories
  18. Not losing? Reduce by 100-200 calories
  19. Calculate yours with our TDEE Calculator and Calorie Calculator!