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 Harris-Benedict equation:

Where:

• \( BMR \) — Basal Metabolic Rate (kcal/day)
• \( activity \) — Activity multiplier (1.2-1.9)

BMR Calculation:

• Men: BMR = 88.362 + (13.397 × weight in kg) + (4.799 × height in cm) - (5.677 × age in years)
• Women: BMR = 447.593 + (9.247 × weight in kg) + (3.098 × height in cm) - (4.330 × age in years)

3. Importance of TDEE Calculation

Details: Knowing your TDEE helps you understand your daily calorie needs for weight maintenance, weight loss, or weight gain. It's a fundamental concept in nutrition planning and weight management.

4. Using the Calculator

Tips: Enter your 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).

5. Frequently Asked Questions (FAQ)

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

Q2: How accurate is this calculator?
A: It provides a good estimate based on standard equations, but individual variations may exist due to factors like genetics and body composition.

Q3: Should I eat below or above my TDEE?
A: To lose weight, eat below your TDEE; to gain weight, eat above it; to maintain weight, eat around your TDEE.

Q4: How often should I recalculate my TDEE?
A: Recalculate whenever your weight changes significantly (more than 5kg) or your activity level changes substantially.

Q5: Are there limitations to this calculation?
A: The equation may be less accurate for very muscular individuals, elderly people, or those with certain medical conditions.