BMR Calculator Nasm

BMR Equation:

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

BMR (kcal/day):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is the BMR Calculator?

The BMR (Basal Metabolic Rate) Calculator using the NASM recommended Mifflin-St Jeor equation estimates the number of calories your body needs to perform basic life-sustaining functions at rest.

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 provides an estimate of your basal metabolic rate, which represents the number of calories you burn at complete rest.

3. Importance of BMR Calculation

Details: Knowing your BMR is essential for creating effective nutrition plans, weight management programs, and understanding your body's basic energy requirements.

4. Using the Calculator

Tips: Enter your weight in kg, height in cm, and age in years. 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 may include minimal activity.

Q2: Why use Mifflin-St Jeor equation?
A: The Mifflin-St Jeor equation is considered one of the most accurate BMR prediction equations and is recommended by NASM for its precision across various populations.

Q3: How often should I recalculate my BMR?
A: You should recalculate your BMR whenever there are significant changes in your weight, body composition, or age (typically every few months).

Q4: Does this calculator account for activity level?
A: No, this calculator provides only your basal metabolic rate. To calculate total daily energy expenditure, you would need to multiply your BMR by an activity factor.

Q5: Are there limitations to this equation?
A: While accurate for most populations, the equation may be less precise for extremely muscular individuals, those with very high or very low body fat percentages, or certain medical conditions.