1. What is BMR and Calorie Intake?

Basal Metabolic Rate (BMR) is the number of calories your body needs to maintain basic physiological functions at rest. Daily calorie intake is calculated by multiplying BMR by an activity factor to estimate total daily energy expenditure.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor equations:

Where:

• \( weight \) — Body weight in kilograms
• \( height \) — Height in centimeters
• \( age \) — Age in years
• \( gender\_factor \) — +5 for men, -161 for women
• \( activity\_factor \) — Multiplier based on activity level (1.2-1.9)

Explanation: The equation accounts for basic metabolic needs plus additional energy expenditure based on activity level.

3. Importance of BMR Calculation

Details: Knowing your BMR helps with weight management, determining calorie needs for weight loss or gain, and understanding your metabolism.

4. Using the Calculator

Tips: Enter accurate weight and height measurements. Select your typical activity level for the most accurate calorie estimate.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this calculator?
A: It provides a good estimate for most people, but individual variations in metabolism can affect actual needs by ±10-15%.

Q2: What are normal BMR values?
A: Typical BMR ranges from 1200-2000 kcal/day for adults, with men generally higher than women due to greater muscle mass.

Q3: When should I recalculate my BMR?
A: Recalculate after significant weight changes (5+ kg) or changes in body composition (muscle gain/fat loss).

Q4: Are there limitations to this equation?
A: Less accurate for very muscular or very obese individuals, pregnant women, and those with metabolic disorders.

Q5: Should I eat exactly my calculated calorie needs?
A: Use it as a starting point and adjust based on your weight changes and energy levels over time.