1. What is TDEE?

TDEE (Total Daily Energy Expenditure) 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 nutrition planning.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor equation with activity factor:

Where:

• \( weight \) — Body weight in kilograms (kg)
• \( height \) — Height in centimeters (cm)
• \( age \) — Age in years
• \( activity\ factor \) — Multiplier based on activity level

Explanation: The equation calculates your basal metabolic rate first, then multiplies it by your activity level to estimate total daily energy expenditure.

3. Importance of TDEE Calculation

Details: Knowing your TDEE is crucial for effective weight management. To lose weight, consume fewer calories than your TDEE; to gain weight, consume more. It helps create personalized nutrition plans and achieve fitness goals.

4. Using the Calculator

Tips: Enter your weight in kg, height in cm, age in years, and select your activity level based on your weekly exercise routine. All values must be valid positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What are the different activity factors?
A: Sedentary (1.2), Lightly active (1.375), Moderately active (1.55), Very active (1.725), Extra active (1.9)

Q2: How accurate is this TDEE calculation?
A: The Mifflin-St Jeor equation is considered one of the most accurate for estimating BMR, but individual variations may occur due to metabolism differences.

Q3: Should I use this for weight loss?
A: Yes, subtract 300-500 calories from your TDEE for gradual weight loss of 0.5-1kg per week.

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

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