Minimum Calories Burned in a Day Calculator

Basal Metabolic Rate (BMR) Equation:

\[ \text{Mifflin-St Jeor Equation:} \] \[ \text{Men: BMR} = 10 \times \text{weight(kg)} + 6.25 \times \text{height(cm)} - 5 \times \text{age(y)} + 5 \] \[ \text{Women: BMR} = 10 \times \text{weight(kg)} + 6.25 \times \text{height(cm)} - 5 \times \text{age(y)} - 161 \]

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Age:

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Basal Metabolic Rate (BMR):

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1. What is Basal Metabolic Rate (BMR)?

BMR represents the minimum number of calories your body needs to perform basic life-sustaining functions like breathing, circulation, and cell production while at complete rest. It accounts for 60-75% of daily calorie expenditure.

2. How Does the Calculator Work?

The calculator uses the Mifflin-St Jeor Equation:

\[ \text{Men: BMR} = 10 \times \text{weight(kg)} + 6.25 \times \text{height(cm)} - 5 \times \text{age(y)} + 5 \] \[ \text{Women: BMR} = 10 \times \text{weight(kg)} + 6.25 \times \text{height(cm)} - 5 \times \text{age(y)} - 161 \]

Where:

\( weight \) — Body weight in kilograms
\( height \) — Height in centimeters
\( age \) — Age in years
Different constants are used for men and women

Explanation: This equation is considered the most accurate for estimating BMR in healthy individuals.

3. Importance of BMR Calculation

Details: Knowing your BMR helps determine your daily calorie needs for weight maintenance, loss, or gain. It's the foundation for all calorie calculations.

4. Using the Calculator

Tips: Enter your weight in kg, height in cm, age in years, and select your gender. For best results, measure your weight and height accurately.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is the BMR calculation?
A: The Mifflin-St Jeor equation is about 90% accurate for most people, but individual variations in muscle mass and body composition can affect results.

Q2: What's the difference between BMR and TDEE?
A: BMR is calories burned at complete rest, while TDEE (Total Daily Energy Expenditure) includes all daily activities and exercise.

Q3: Does muscle mass affect BMR?
A: Yes, muscle tissue burns more calories at rest than fat tissue, so those with more muscle mass typically have higher BMR.

Q4: How often should I recalculate my BMR?
A: Recalculate after significant weight changes (5+ kg) or annually as you age, since BMR decreases about 1-2% per decade after age 20.

Q5: Can I increase my BMR?
A: Yes, through strength training to build muscle, proper nutrition, adequate sleep, and staying hydrated.