1. What is the Calorie Calculator?

The Calorie Calculator estimates your daily energy needs based on your basal metabolic rate (BMR) and activity level. It uses the Mifflin-St Jeor equation for BMR calculation, which is the most accurate for healthy individuals.

2. How Does the Calculator Work?

The calculator uses two main equations:

Where:

• \( weight \) — Weight in kilograms
• \( height \) — Height in centimeters
• \( age \) — Age in years
• \( activity\_factor \) — Multiplier based on activity level (1.2-1.9)

Explanation: The equation calculates your resting energy needs (BMR) then adjusts for your activity level to estimate total daily energy expenditure.

3. Importance of Calorie Calculation

Details: Knowing your daily calorie needs helps with weight management, whether your goal is weight loss, maintenance, or gain. It provides a scientific basis for meal planning.

4. Using the Calculator

Tips: Enter your accurate weight and height for best results. Be honest about your activity level. For weight loss, subtract 300-500 kcal from the result; for weight gain, add 300-500 kcal.

5. Frequently Asked Questions (FAQ)

Q1: Why use Mifflin-St Jeor instead of Harris-Benedict?
A: The Mifflin-St Jeor equation is more accurate for modern populations and has been validated in numerous studies.

Q2: How often should I recalculate my calories?
A: Recalculate whenever your weight changes by 5+ kg or your activity level changes significantly.

Q3: Does this account for body composition?
A: No, these equations use total body weight. Those with very high muscle mass may need slightly more calories.

Q4: Are there limitations to this calculator?
A: It may overestimate needs for obese individuals and underestimate for very muscular individuals.

Q5: Should I eat exactly these calories?
A: Use this as a starting point and adjust based on your actual weight changes over 2-4 weeks.