BMR Calculator

BMR Equation for Men:

\[ BMR = 66.5 + (13.75 \times W) + (5.003 \times H) - (6.75 \times A) \]

Weight (W):

Height (H):

Age (A):

years

Gender:

Basal Metabolic Rate (BMR):

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1. What Is BMR Calculator?

The BMR (Basal Metabolic Rate) Calculator estimates the number of calories your body needs to perform basic life-sustaining functions at rest. It represents the minimum energy required to maintain vital functions like breathing, circulation, and cell production.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor Equation:

\[ \text{Men: } BMR = 66.5 + (13.75 \times W) + (5.003 \times H) - (6.75 \times A) \] \[ \text{Women: } BMR = 655.1 + (9.563 \times W) + (1.850 \times H) - (4.676 \times A) \]

Where:

\( W \) — Weight in kilograms (kg)
\( H \) — Height in centimeters (cm)
\( A \) — Age in years

Explanation: The equation calculates the energy expenditure required to maintain basic physiological functions while at complete rest.

3. Importance of BMR Calculation

Details: Knowing your BMR is essential for weight management, creating effective diet plans, and determining daily caloric needs for maintaining, losing, or gaining weight.

4. Using the Calculator

Tips: Enter your weight in kg, height in cm, age in years, and select your gender. All values must be valid (weight > 0, height > 0, age between 1-120).

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between BMR and RMR?
A: BMR (Basal Metabolic Rate) measures energy expenditure at complete rest, while RMR (Resting Metabolic Rate) measures energy expenditure at rest but not necessarily in a fasting state.

Q2: How often does BMR change?
A: BMR changes with age, weight fluctuations, muscle mass changes, and hormonal factors. It typically decreases with age and weight loss.

Q3: Can I increase my BMR?
A: Yes, through regular exercise, especially strength training to build muscle mass, as muscle tissue burns more calories at rest than fat tissue.

Q4: How accurate is the BMR calculation?
A: While the Mifflin-St Jeor equation is considered one of the most accurate formulas, individual variations in metabolism mean it provides an estimate rather than an exact measurement.

Q5: How should I use my BMR for weight management?
A: Your BMR represents the calories needed for basic functions. To maintain weight, multiply BMR by an activity factor. To lose weight, create a calorie deficit below this total.