Calculate Your Daily Calories

Harris-Benedict Formula:

\[ BMR = \begin{cases} 66.5 + (13.75 \times weight) + (5.003 \times height) - (6.75 \times age) & \text{for men} \\ 655.1 + (9.563 \times weight) + (1.850 \times height) - (4.676 \times age) & \text{for women} \end{cases} \] \[ Calories = BMR \times Activity\ Factor \]

Gender:

Weight:

Height:

Age:

years

Activity Level:

Estimated Daily Calories:

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1. What is the Harris-Benedict Formula?

The Harris-Benedict Formula is a widely used equation that estimates basal metabolic rate (BMR) - the number of calories your body needs to perform basic life-sustaining functions. It was originally published in 1918 and revised in 1984 to improve accuracy.

2. How Does the Calculator Work?

The calculator uses the Harris-Benedict equation:

Where:

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

Explanation: The formula calculates your basal metabolic rate (BMR) and then multiplies it by an activity factor to estimate total daily energy expenditure.

3. Importance of Daily Calorie Calculation

Details: Knowing your daily calorie needs is essential for weight management, whether you want to lose, maintain, or gain weight. It helps create appropriate diet plans and ensures you're meeting your body's energy requirements.

4. Using the Calculator

Tips: Enter your weight in kilograms, height in centimeters, age in years, select your gender and activity level. For accurate results, use your current measurements and be honest about your activity level.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is the Harris-Benedict formula?
A: It provides a good estimate for most people but may be less accurate for very muscular individuals, those with high body fat percentages, or elderly populations.

Q2: Should I use this for weight loss?
A: Yes, but subtract 500-1000 calories from the result for safe weight loss of 0.5-1 kg per week. Consult a healthcare professional for personalized advice.

Q3: How often should I recalculate my calorie needs?
A: Recalculate whenever your weight changes significantly (5+ kg) or your activity level changes substantially.

Q4: Are there limitations to this formula?
A: It doesn't account for body composition differences, medical conditions, or hormonal factors that can affect metabolism.

Q5: 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 is calculated by multiplying BMR by an activity factor.