1. What is TDEE?

Total Daily Energy Expenditure (TDEE) is an estimate of how many calories you burn per day when exercise is taken into account. It's calculated by first figuring out your Basal Metabolic Rate (BMR), then multiplying that value by an activity multiplier.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor Equation for men:

Where:

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

Activity Factors:

• Sedentary (little or no exercise): 1.2
• Lightly active (light exercise 1-3 days/week): 1.375
• Moderately active (moderate exercise 3-5 days/week): 1.55
• Very active (hard exercise 6-7 days/week): 1.725
• Extra active (very hard exercise, physical job): 1.9

3. Importance of TDEE Calculation

Details: Knowing your TDEE is essential for weight management. To lose weight, you need to consume fewer calories than your TDEE; to gain weight, you need to consume more calories than your TDEE.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this TDEE calculation?
A: The Mifflin-St Jeor equation is considered one of the most accurate BMR formulas, but individual results may vary based on body composition and other factors.

Q2: Should I use metric or imperial measurements?
A: This calculator uses metric measurements (kg for weight, cm for height). If you have imperial measurements, convert them first (1 lb = 0.4536 kg, 1 inch = 2.54 cm).

Q3: How often should I recalculate my TDEE?
A: You should recalculate your TDEE whenever your weight changes significantly (more than 5 kg) or your activity level changes substantially.

Q4: Why is there a different formula for men and women?
A: Men typically have more muscle mass and higher metabolic rates than women, which is accounted for in the different formulas.

Q5: Can I use this calculation for weight loss?
A: Yes, this is an excellent starting point for weight loss. Subtract 500 calories from your TDEE to lose approximately 0.5 kg per week.