How Accurate Is BMR Calculator

Mifflin-St Jeor Equation:

\[ BMR = 10 \times weight + 6.25 \times height - 5 \times age - 161 \]

Basal Metabolic Rate (BMR):

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1. What is the Mifflin-St Jeor Equation?

The Mifflin-St Jeor equation is a widely used formula for estimating Basal Metabolic Rate (BMR), which represents the number of calories your body needs at rest to maintain basic physiological functions. It's considered one of the most accurate BMR equations for healthy individuals.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor equation:

\[ BMR = 10 \times weight + 6.25 \times height - 5 \times age - 161 \]

Where:

\( weight \) — Body weight in kilograms (kg)
\( height \) — Height in centimeters (cm)
\( age \) — Age in years

Explanation: This equation calculates the estimated number of calories your body burns at complete rest based on your weight, height, and age.

3. Importance of BMR Calculation

Details: Knowing your BMR is essential for creating effective weight management plans, determining daily calorie needs, and understanding your body's basic energy requirements for maintaining vital functions.

4. Using the Calculator

Tips: Enter your weight in kilograms, height in centimeters, and age in years. All values must be valid (weight > 0, height > 0, age between 1-120). For accurate results, use current measurements.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is the Mifflin-St Jeor equation?
A: The Mifflin-St Jeor equation is considered one of the most accurate BMR prediction formulas, with an accuracy of about ±10% for most healthy individuals.

Q2: What factors affect BMR accuracy?
A: Body composition, muscle mass, hormonal factors, and individual metabolic variations can affect the accuracy of BMR calculations.

Q3: Should I use this for weight loss planning?
A: Yes, BMR is the foundation for calculating Total Daily Energy Expenditure (TDEE), which helps determine appropriate calorie intake for weight loss or maintenance.

Q4: How often should I recalculate my BMR?
A: Recalculate when there are significant changes in weight, age, or body composition, typically every 3-6 months or after major lifestyle changes.

Q5: Are there limitations to this equation?
A: The equation may be less accurate for athletes, elderly individuals, pregnant women, or those with certain medical conditions affecting metabolism.