1. What is BMR?

Basal Metabolic Rate (BMR) is the number of calories your body needs to maintain basic physiological functions at rest. It accounts for 60-75% of daily calorie expenditure.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor equation:

Where:

• \( weight \) — Body weight in kilograms
• \( height \) — Height in centimeters
• \( age \) — Age in years
• \( +5 \) — Added for men
• \( -161 \) — Subtracted for women

3. Importance of BMR Calculation

Details: Knowing your BMR helps determine your daily calorie needs for weight maintenance, loss, or gain. It's the foundation for creating personalized nutrition plans.

4. Using the Calculator

Tips: Enter your weight in kg, height in cm, age in years, and select your gender. For accurate results, measure your weight and height in the morning before eating.

5. Frequently Asked Questions (FAQ)

Q1: How does BMR differ from TDEE?
A: BMR is calories burned at complete rest. TDEE (Total Daily Energy Expenditure) includes activity and is typically 1.2-2.5 × BMR.

Q2: Why is BMR different for men and women?
A: Men generally have more muscle mass and less body fat, resulting in higher BMR at the same weight.

Q3: How accurate is this BMR calculation?
A: The Mifflin-St Jeor equation is about 90% accurate for most people. For elite athletes or those with unusual body compositions, indirect calorimetry may be more precise.

Q4: Does BMR change over time?
A: Yes, BMR decreases with age (about 1-2% per decade after 20) and with weight loss, but strength training can help maintain it.

Q5: What's a healthy BMI range?
A: 18.5-24.9 is normal, 25-29.9 is overweight, and 30+ is obese. However, BMI doesn't account for muscle mass.