Calories Per Weight Calculator Based On

Mifflin-St Jeor Formula:

\[ BMR = 10 \times Weight + 6.25 \times Height - 5 \times Age + (5 \text{ for men or } -161 \text{ for women}) \]

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Age:

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BMR:

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1. What Is The Mifflin-St Jeor Formula?

The Mifflin-St Jeor formula is a widely used equation to estimate Basal Metabolic Rate (BMR), which represents the number of calories your body needs at rest to maintain basic physiological functions.

2. How Does The Calculator Work?

The calculator uses the Mifflin-St Jeor formula:

\[ BMR = 10 \times Weight + 6.25 \times Height - 5 \times Age + (5 \text{ for men or } -161 \text{ for women}) \]

Where:

\( Weight \) — Body weight in kilograms (kg)
\( Height \) — Height in centimeters (cm)
\( Age \) — Age in years
5 — Additional constant for men
-161 — Additional constant for women

Explanation: The formula calculates the basal metabolic rate based on body composition, height, age, and gender differences in metabolic rates.

3. Importance Of BMR Calculation

Details: Accurate BMR estimation is crucial for determining daily caloric needs, creating effective weight management plans, and establishing appropriate nutritional requirements for different individuals.

4. Using The Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Why use Mifflin-St Jeor instead of other formulas?
A: The Mifflin-St Jeor formula is considered one of the most accurate BMR equations for the general population, with better precision than older formulas like Harris-Benedict.

Q2: What are typical BMR values?
A: BMR typically ranges from 1200-2000 kcal/day for adults, with men generally having higher BMR than women due to greater muscle mass.

Q3: How does BMR relate to total daily energy expenditure?
A: BMR accounts for about 60-75% of total daily energy expenditure. To calculate total needs, multiply BMR by an activity factor (1.2-2.5).

Q4: Are there limitations to this formula?
A: The formula may be less accurate for extremely muscular individuals, those with very high or very low body fat percentages, and certain medical conditions affecting metabolism.

Q5: Should BMR be used for weight loss planning?
A: Yes, BMR provides the foundation for calculating appropriate calorie deficits for safe and sustainable weight loss (typically 500-1000 kcal/day deficit).