The Harris-Benedict Calculator is a tool used to estimate the Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) of an individual based on factors such as weight, height, age, gender, and activity level. It utilizes the Harris-Benedict equation, which provides a formula for calculating these values.

**Harris-Benedict Calculator**

**How it works?**

**Basal Metabolic Rate (BMR)**: This represents the number of calories your body needs to maintain basic physiological functions at rest, such as breathing, circulation, and cell production. The Harris-Benedict equation provides separate formulas for calculating BMR based on gender:- For men: BMR = 88.362 + (13.397 * weight in kg) + (4.799 * height in cm) – (5.677 * age in years)
- For women: BMR = 447.593 + (9.247 * weight in kg) + (3.098 * height in cm) – (4.330 * age in years)

**Total Daily Energy Expenditure (TDEE)**: This represents the total number of calories your body needs in a day, including activity level. To calculate TDEE, you multiply the BMR by an activity factor that represents your level of physical activity:- Sedentary (little to no exercise): BMR * 1.2
- Lightly active (light exercise/sports 1-3 days/week): BMR * 1.375
- Moderately active (moderate exercise/sports 3-5 days/week): BMR * 1.55
- Very active (hard exercise/sports 6-7 days a week): BMR * 1.725
- Extra active (very hard exercise/sports & physical job or 2x training): BMR * 1.9

**Using the Calculator**: Users input their weight, height, and age, and select their activity level from the dropdown menu. When they click the “Calculate” button, the calculator computes their BMR using the appropriate formula based on gender and then multiplies it by the selected activity factor to determine their TDEE. The result is displayed on the page.

**FAQs**

**Q: What is the Harris-Benedict Equation?**

The Harris-Benedict Equation is a formula used to estimate an individual’s Basal Metabolic Rate (BMR), which represents the number of calories their body needs to maintain basic physiological functions at rest. It was developed in 1919 by James Arthur Harris and Francis Gano Benedict.

**Q: What factors does the Harris-Benedict Calculator take into account?**

The calculator takes into account factors such as weight, height, age, gender, and activity level to estimate an individual’s BMR and Total Daily Energy Expenditure (TDEE).

**Q: How accurate is the Harris-Benedict Calculator?**

The Harris-Benedict Calculator provides estimates based on established formulas and general activity levels. While it can give a good approximation of calorie needs, it may not perfectly match individual metabolic rates or lifestyle factors. Adjustments may be necessary based on personal experience and goals.

**Q: What is the difference between BMR and TDEE?**

BMR (Basal Metabolic Rate) represents the calories your body needs to maintain basic functions at rest. TDEE (Total Daily Energy Expenditure) includes BMR plus additional calories burned through physical activity and the thermic effect of food.