1. What is Calorie Expenditure Calculator?

The Calorie Expenditure Calculator estimates your Total Daily Energy Expenditure (TDEE), which represents the total number of calories your body burns in a day, including basal metabolic rate and physical activity.

2. How Does the Calculator Work?

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

Where BMR is calculated as:

• For men: \( BMR = 10 \times weight + 6.25 \times height - 5 \times age + 5 \)
• For women: \( BMR = 10 \times weight + 6.25 \times height - 5 \times age - 161 \)

Activity Factors:

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

3. Importance of TDEE Calculation

Details: Knowing your TDEE is essential for weight management, whether your goal is weight loss, weight maintenance, or weight gain. It helps determine appropriate calorie intake for your goals.

4. Using the Calculator

Tips: Enter your weight in kg, height in cm, age in years, select gender and activity level. Be honest about your activity level for accurate results.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between BMR and TDEE?
A: BMR (Basal Metabolic Rate) is the calories your body burns at rest, while TDEE includes all calories burned through daily activities and exercise.

Q2: How accurate is this calculator?
A: The Mifflin-St Jeor equation is considered one of the most accurate BMR formulas for most people, though individual variations exist.

Q3: Should I use metric or imperial units?
A: This calculator uses metric units (kg for weight, cm for height) as they provide more precise calculations.

Q4: How often should I recalculate my TDEE?
A: Recalculate every 4-6 weeks or whenever your weight, activity level, or body composition changes significantly.

Q5: Can TDEE change over time?
A: Yes, TDEE can change with age, weight changes, muscle mass changes, and alterations in activity levels.