Tdee Calculator Without Body Fat

Mifflin-St Jeor Equation:

\[ BMR_{men} = 10 \times weight + 6.25 \times height - 5 \times age + 5 \] \[ BMR_{women} = 10 \times weight + 6.25 \times height - 5 \times age - 161 \] \[ TDEE = BMR \times activity\ multiplier \]

Weight:

Height:

Age:

years

Gender:

Activity Level:

Basal Metabolic Rate (BMR):

Total Daily Energy Expenditure (TDEE):

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1. What is TDEE Calculation Without Body Fat?

The TDEE (Total Daily Energy Expenditure) calculator estimates your daily calorie needs using the Mifflin-St Jeor equation, which calculates BMR (Basal Metabolic Rate) based on weight, height, age, and gender, then applies an activity multiplier to estimate total energy expenditure.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor equations:

\[ BMR_{men} = 10 \times weight + 6.25 \times height - 5 \times age + 5 \] \[ BMR_{women} = 10 \times weight + 6.25 \times height - 5 \times age - 161 \] \[ TDEE = BMR \times activity\ multiplier \]

Where:

\( weight \) — Body weight in kilograms (kg)
\( height \) — Height in centimeters (cm)
\( age \) — Age in years
\( activity\ multiplier \) — Sedentary: 1.2, Light: 1.375, Moderate: 1.55, Very Active: 1.725, Extra Active: 1.9

Explanation: The Mifflin-St Jeor equation is currently considered one of the most accurate BMR formulas for the general population when body fat percentage is not available.

3. Importance of TDEE Calculation

Details: Knowing your TDEE is essential for weight management, whether your goal is weight loss, maintenance, or muscle gain. It provides a scientific basis for determining appropriate calorie intake.

4. Using the Calculator

Tips: Enter your weight in kg, height in cm, age in years, select your gender, and choose the activity level that best matches your weekly exercise routine. All values must be valid positive numbers.

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, and is widely accepted in clinical practice.

Q2: How accurate is this calculation without body fat?
A: While body fat percentage can provide more precision, the Mifflin-St Jeor equation provides reliable estimates for most people without requiring body fat measurements.

Q3: Should I use metric or imperial measurements?
A: This calculator uses metric measurements (kg and cm) as they provide more precise calculations. 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 whenever your weight changes significantly (±2-3 kg) or if your activity level changes substantially. Otherwise, recalculating every 1-2 months is sufficient.

Q5: Can this calculator be used for athletes?
A: While useful for general population, athletes with very high muscle mass may find the calculation underestimates their needs. In such cases, methods incorporating body composition may be more accurate.