Bmr Calculator Mifflin St Jeor Equation

Mifflin-St Jeor Equation:

For Men: BMR = 10 × weight + 6.25 × height - 5 × age + 5
For Women: BMR = 10 × weight + 6.25 × height - 5 × age - 161

Weight:

Height:

Age:

years

Gender:

Basal Metabolic Rate (BMR):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is the Mifflin-St Jeor Equation?

The Mifflin-St Jeor Equation is a formula used to estimate 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:

For Men: BMR = 10 × weight + 6.25 × height - 5 × age + 5
For Women: BMR = 10 × weight + 6.25 × height - 5 × age - 161

Where:

Weight — in kilograms (kg)
Height — in centimeters (cm)
Age — in years
Gender — male or female

Explanation: The equation calculates the minimum energy requirement for your body to function at complete rest, accounting 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 needs. It forms the foundation for calculating Total Daily Energy Expenditure (TDEE).

4. Using the Calculator

Tips: Enter your weight in kilograms, height in centimeters, 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: Why use Mifflin-St Jeor instead of other BMR formulas?
A: The Mifflin-St Jeor equation is considered more accurate than older formulas like Harris-Benedict, especially for obese and non-obese individuals.

Q2: What factors can affect BMR?
A: Age, gender, body composition, genetics, hormonal factors, and environmental temperature can all influence your BMR.

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

Q4: Is BMR the same as metabolism?
A: BMR represents your basal metabolic rate at complete rest, while metabolism includes all energy-expending processes including physical activity.

Q5: How can I use BMR for weight management?
A: Your BMR helps determine your maintenance calories. To lose weight, consume fewer calories than your TDEE (BMR + activity); to gain weight, consume more.