Most Accurate Calorie Needs Calculator

Mifflin-St Jeor Equation:

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

Weight:

Height:

Age:

years

Gender:

Activity Level:

Estimated Daily Calorie Needs:

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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). It estimates the number of calories your body needs at complete rest, which is then multiplied by an activity factor to determine total daily energy expenditure (TDEE).

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:

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

Explanation: The equation calculates your basal metabolic rate and then multiplies it by your activity level to estimate total daily calorie needs.

3. Importance Of Calorie Calculation

Details: Accurate calorie estimation is crucial for weight management, whether your goal is weight loss, weight maintenance, or weight gain. Understanding your TDEE helps create effective nutrition plans.

4. Using The Calculator

Tips: Enter your weight in kilograms, height in centimeters, age in years, select gender and activity level. 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 equations?
A: The Mifflin-St Jeor equation is considered the most accurate for estimating BMR in both normal weight and obese individuals.

Q2: What are typical calorie needs?
A: Calorie needs vary widely based on age, gender, weight, height, and activity level. Most adults need 1,600-3,000 calories per day.

Q3: How accurate is this calculator?
A: While the Mifflin-St Jeor equation is highly accurate, individual variations in metabolism may cause actual needs to differ by ±10-15%.

Q4: Should I use this for weight loss?
A: Yes, subtract 500 calories from your TDEE for a safe weight loss of about 0.5kg per week.

Q5: How often should I recalculate?
A: Recalculate every 4-6 weeks if your weight changes significantly, or if your activity level changes.