1. What is TDEE?

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 a crucial metric for weight management and nutritional 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 (1.2-1.9)

Explanation: The equation first calculates your Basal Metabolic Rate (BMR) - the calories your body needs at complete rest - then multiplies it by your activity level to estimate total daily energy expenditure.

3. Importance of TDEE Calculation

Details: Knowing your TDEE helps you determine appropriate calorie intake for weight loss, maintenance, or gain. It provides a scientific basis for creating effective diet and nutrition plans tailored to your individual energy needs.

4. Using the Calculator

Tips: Enter your weight in kg, height in cm, age in years, and select your activity level based on your typical weekly exercise routine. Be honest about your activity level for accurate results.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between BMR and TDEE?
A: BMR is the calories your body burns at complete rest, while TDEE includes all calories burned through physical activity and digestion throughout the day.

Q2: How accurate is this TDEE calculation?
A: While the Mifflin-St Jeor equation is considered one of the most accurate formulas, individual variations in metabolism mean it should be used as an estimate rather than an exact measurement.

Q3: Should I use metric or imperial measurements?
A: This calculator uses metric measurements (kg and cm) as they provide more precise calculations. Convert imperial measurements if needed (1 kg = 2.2 lbs, 1 cm = 0.39 inches).

Q4: How often should I recalculate my TDEE?
A: Recalculate whenever your weight changes significantly (±5 kg), your activity level changes substantially, or every 3-6 months to account for metabolic changes.

Q5: Can TDEE change over time?
A: Yes, TDEE decreases with age due to metabolic slowdown and can change with weight loss/gain and changes in muscle mass or activity levels.