Base Calorie Burn Rate Calculator

Mifflin-St Jeor Equation:

\[ BMR = 10 \times weight + 6.25 \times height - 5 \times age + 5 \text{ (men)} \] \[ BMR = 10 \times weight + 6.25 \times height - 5 \times age - 161 \text{ (women)} \]

Weight:

Height:

Age:

years

Gender:

Basal Metabolic Rate (BMR):

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1. What is Basal Metabolic Rate?

Basal Metabolic Rate (BMR) is the number of calories your body needs to perform basic life-sustaining functions at complete rest. This includes breathing, circulation, cell production, nutrient processing, and maintaining body temperature.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor equation:

\[ BMR = 10 \times weight + 6.25 \times height - 5 \times age + 5 \text{ (men)} \] \[ BMR = 10 \times weight + 6.25 \times height - 5 \times age - 161 \text{ (women)} \]

Where:

\( weight \) — Body weight in kilograms (kg)
\( height \) — Height in centimeters (cm)
\( age \) — Age in years
\( +5 \) — Constant for males
\( -161 \) — Constant for females

Explanation: This equation is considered the most accurate for estimating BMR in healthy individuals and accounts for differences in body composition between genders.

3. Importance of BMR Calculation

Details: Knowing your BMR is essential for weight management, creating effective diet plans, and understanding your body's energy requirements. It serves as the foundation for calculating total daily energy expenditure (TDEE).

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between BMR and RMR?
A: BMR measures energy expenditure at complete rest in a thermally neutral environment, while RMR (Resting Metabolic Rate) is measured under less strict conditions and is typically slightly higher.

Q2: How accurate is the Mifflin-St Jeor equation?
A: It's about 90% accurate for most people and is considered the gold standard for BMR estimation in clinical settings.

Q3: Does muscle mass affect BMR?
A: Yes, muscle tissue burns more calories at rest than fat tissue. Individuals with higher muscle mass typically have higher BMR.

Q4: How often should I recalculate my BMR?
A: Recalculate every 3-6 months or whenever you experience significant weight changes (±5 kg) or lifestyle changes.

Q5: Can I use BMR for weight loss planning?
A: Yes, BMR is the starting point for calculating your total daily energy needs. Creating a calorie deficit relative to your TDEE (BMR × activity factor) leads to weight loss.