Tdee Calculator Mifflin-st Jeor Equation

Mifflin-St Jeor Equation:

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

Weight:

Height:

Age:

years

Gender:

Activity Level:

Basal Metabolic Rate (BMR):

Total Daily Energy Expenditure (TDEE):

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1. What is the Mifflin-St Jeor Equation?

The Mifflin-St Jeor equation is considered one of the most accurate formulas for calculating Basal Metabolic Rate (BMR), which represents the number of calories your body needs at complete rest. TDEE (Total Daily Energy Expenditure) is calculated by multiplying BMR by an activity factor.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor equation:

\[ BMR = (10 \times weight + 6.25 \times height - 5 \times age + s) \] \[ TDEE = BMR \times activity\_factor \]

Where:

\( weight \) — Weight in kilograms (kg)
\( height \) — Height in centimeters (cm)
\( age \) — Age in years
\( s \) — +5 for males, -161 for females
\( activity\_factor \) — Multiplier based on activity level

Activity Factors:

1.2 - Sedentary (little or no exercise)
1.375 - Lightly active (light exercise 1-3 days/week)
1.55 - Moderately active (moderate exercise 3-5 days/week)
1.725 - Very active (hard exercise 6-7 days/week)
1.9 - Extra active (very hard exercise, physical job)

3. Importance of TDEE Calculation

Details: Knowing your TDEE is crucial for weight management. It helps determine your daily calorie needs for maintaining, losing, or gaining weight. For weight loss, consume fewer calories than your TDEE; for weight gain, consume more.

4. Using the Calculator

Tips: Enter your weight in kg, height in cm, age in years, select your gender and activity level. Use accurate measurements for best results. The activity factor should reflect your typical weekly exercise routine.

5. Frequently Asked Questions (FAQ)

Q1: Why use Mifflin-St Jeor instead of other equations?
A: The Mifflin-St Jeor equation is considered more accurate than older equations like Harris-Benedict, especially for obese individuals.

Q2: How accurate is the TDEE calculation?
A: While highly accurate for most people, individual variations in metabolism can affect results. Use it as a starting point and adjust based on your actual results.

Q3: Should I use metric or imperial measurements?
A: The equation requires metric measurements (kg for weight, cm for height). Convert imperial measurements if necessary (1 lb = 0.4536 kg, 1 inch = 2.54 cm).

Q4: How often should I recalculate my TDEE?
A: Recalculate when your weight changes significantly (±5 kg), or if your activity level changes substantially.

Q5: Can this calculator be used for athletes?
A: Yes, but highly trained athletes may have different metabolic rates. The "extra active" category is designed for those with intense training regimens.