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 in most people.

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

Note: This equation provides an estimate with an accuracy of ±10-20%. Individual variations in body composition and metabolism affect actual BMR.

3. Importance of BMR Calculation

Details: Knowing your BMR helps in creating personalized diet plans, setting weight loss/gain goals, and understanding your body's energy needs.

4. Using the Calculator

Tips: Enter your weight in kg, height in cm, and age in years. For best results, measure your weight and height accurately.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this BMR calculator?
A: The calculator has an accuracy of ±10-20% compared to laboratory measurements. Individual factors like muscle mass and thyroid function can affect actual BMR.

Q2: Why does BMR decrease with age?
A: BMR typically decreases about 1-2% per decade after age 20 due to loss of muscle mass and changes in hormonal and neurological regulation.

Q3: How can I increase my BMR?
A: Building muscle through strength training can increase BMR, as muscle tissue burns more calories at rest than fat tissue.

Q4: Should I use BMR or TDEE for weight loss?
A: Total Daily Energy Expenditure (TDEE) is more useful as it accounts for activity level. BMR only reflects resting metabolism.

Q5: Does body fat percentage affect BMR?
A: Yes, but less than you might think. Muscle tissue is metabolically more active than fat, so people with higher muscle mass typically have higher BMR.