1. What is BMR and TDEE?

BMR (Basal Metabolic Rate) is the number of calories your body needs to maintain basic physiological 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 equation for BMR:

Where:

• \( weight \) — Weight in kilograms
• \( height \) — Height in centimeters
• \( age \) — Age in years
• \( s \) — +5 for men, -161 for women

TDEE is calculated by multiplying BMR by an activity factor:

3. Importance of BMR and TDEE Calculation

Details: Knowing your BMR and TDEE helps with weight management, whether your goal is weight loss, maintenance, or gain. It provides a scientific basis for determining your daily caloric needs.

4. Using the Calculator

Tips: Enter your weight in kg, height in cm, age in years, select gender and activity level. For accurate results, measure your weight and height precisely.

5. Frequently Asked Questions (FAQ)

Q1: Why use Mifflin-St Jeor equation?
A: It's currently considered the most accurate BMR equation for healthy individuals.

Q2: What are typical BMR values?
A: Average BMR is about 1500-2000 kcal/day for men and 1300-1700 kcal/day for women, but varies based on size and body composition.

Q3: How accurate is the TDEE calculation?
A: It provides a good estimate, but actual energy expenditure can vary based on factors like muscle mass, genetics, and NEAT (non-exercise activity thermogenesis).

Q4: Should I eat my BMR or TDEE?
A: For weight maintenance, eat your TDEE. For weight loss, eat below your TDEE but generally not below your BMR unless under medical supervision.

Q5: How often should I recalculate?
A: Recalculate whenever your weight changes significantly (±5kg) or your activity level changes substantially.