Tdee Calculator Mifflin St Jeor

Mifflin-St Jeor Equation:

\[ TDEE = (10 \times weight + 6.25 \times height - 5 \times age - 161) \times activity\ factor \]

Weight:

Height:

Age:

years

Activity Factor:

Total Daily Energy Expenditure (TDEE):

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1. What is the Mifflin-St Jeor Equation?

The Mifflin-St Jeor equation is a widely used formula to estimate Basal Metabolic Rate (BMR), which represents the number of calories your body needs at rest. When multiplied by an activity factor, it calculates Total Daily Energy Expenditure (TDEE) - the total calories you burn in a day.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor equation:

\[ TDEE = (10 \times weight + 6.25 \times height - 5 \times age - 161) \times activity\ factor \]

Where:

\( weight \) — Body weight in kilograms (kg)
\( height \) — Height in centimeters (cm)
\( age \) — Age in years
\( activity\ factor \) — Multiplier based on physical activity level

Explanation: The equation calculates your basal metabolic rate first, then multiplies it by your activity level to determine total daily energy expenditure.

3. Importance of TDEE Calculation

Details: Knowing your TDEE is crucial for weight management - it helps determine appropriate calorie intake for weight loss, maintenance, or muscle gain goals.

4. Using the Calculator

Tips: Enter your weight in kg, height in cm, age in years, and select your activity level. Use accurate measurements for best results. All values must be valid positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is the Mifflin-St Jeor equation?
A: It's considered one of the most accurate BMR equations for healthy adults, with an accuracy of about ±10% for most populations.

Q2: What are the activity factor categories?
A: Sedentary (1.2), Lightly active (1.375), Moderately active (1.55), Very active (1.725), Extra active (1.9).

Q3: Should I use this equation if I'm pregnant or breastfeeding?
A: No, this equation is not designed for pregnant or breastfeeding women. Consult with a healthcare professional for appropriate calorie calculations.

Q4: How often should I recalculate my TDEE?
A: Recalculate every 4-6 weeks if you're actively losing or gaining weight, as your weight changes will affect your TDEE.

Q5: Can this calculator be used for athletes?
A: While it provides a good estimate, athletes with very high muscle mass may need more specialized calculations as muscle tissue burns more calories at rest.