1. What is BMR and TDEE?

BMR (Basal Metabolic Rate) is the number of calories your body needs to perform basic life-sustaining functions at rest. TDEE (Total Daily Energy Expenditure) is the total number of calories you burn in a day, including physical activity.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor equations:

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:

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

3. Importance of BMR and TDEE Calculation

Details: Knowing your BMR and TDEE is essential for weight management, creating effective diet plans, and setting appropriate calorie goals for weight loss, maintenance, or muscle gain.

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 positive numbers.

5. Frequently Asked Questions (FAQ)

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

Q2: How accurate is this calculation?
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 BMR or TDEE for diet planning?
A: Use TDEE for diet planning as it accounts for your total daily energy expenditure including physical activity.

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

Q5: Can this calculator be used for weight loss?
A: Yes, by creating a calorie deficit of 500-1000 calories below your TDEE, you can achieve safe weight loss of 0.5-1 kg per week.