1. What is Total Daily Energy Expenditure?

Total Daily Energy Expenditure (TDEE) represents the total number of calories your body burns in a day, including basal metabolic rate (BMR) and calories burned through physical activity. It's essential for weight management and nutritional planning.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor equation for BMR and multiplies by activity factor:

Where:

• \( BMR \) — Basal Metabolic Rate (calories burned at rest)
• Activity Factor — Multiplier based on physical activity level (1.2 to 1.9)

Explanation: The equation accounts for basic metabolic needs plus additional energy expenditure from daily activities and exercise.

3. Importance of TDEE Calculation

Details: Knowing your TDEE is crucial for weight management - to lose weight, consume fewer calories than your TDEE; to gain weight, consume more. It helps create personalized diet and exercise plans.

4. Using the Calculator

Tips: Enter weight in kg, height in cm, age in years, select gender and activity level. All values must be valid (weight > 0, height > 0, age between 1-120, activity factor between 1.2-1.9).

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between BMR and TDEE?
A: BMR is calories burned at complete rest, while TDEE includes all daily activities and exercise.

Q2: How accurate is this calculation?
A: The Mifflin-St Jeor equation is about 90% accurate for most people, but individual variations exist due to muscle mass, genetics, and other factors.

Q3: Should I use my current weight or goal weight?
A: Always use your current weight for accurate TDEE calculation. Adjust as your weight changes.

Q4: How often should I recalculate my TDEE?
A: Recalculate every 4-6 weeks or after significant weight changes (±5 kg) or activity level changes.

Q5: Can TDEE change with age?
A: Yes, metabolism typically slows with age, so TDEE may decrease over time even with the same weight and activity level.