## Introduction

Understanding the number of calories your body burns in a day is crucial for managing your weight and overall health. The calories burned per day calculator is a valuable tool that helps estimate the energy expenditure based on various factors such as age, weight, height, activity level, and gender.

## Formula:

The calculation of calories burned per day involves several factors. The most commonly used formula is the Harris-Benedict equation:

**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)

Once you have the Basal Metabolic Rate (BMR), you can determine the total calories burned by multiplying it by the Physical Activity Level (PAL) factor.

Total Calories Burned Per Day = BMR×PAL

## How to Use?

**Gather Information:**Collect data on your weight, height, age, gender, and activity level.**Calculate BMR:**Use the appropriate Harris-Benedict equation to find your Basal Metabolic Rate.**Determine Activity Level:**Choose the PAL factor that best matches your activity level.**Calculate Total Calories Burned:**Multiply your BMR by the PAL factor to get an estimate of your daily calorie expenditure.

## Example:

Let’s consider an example for a 30-year-old woman weighing 65 kg, with a height of 160 cm, and a moderate activity level.

**Step 1: Calculate BMR**

$BMR=447.593+(9.247×65)+(3.098×160)−(4.330×30)$ $BMR≈1,387calories per day$

**Step 2: Determine PAL Factor**

For a moderate activity level, let’s use a PAL factor of 1.55.

**Step 3: Calculate Total Calories Burned**

Total Calories Burned Per Day≈1,387×1.55

$Total Calories Burned Per Day≈2,149calories$

So, in this example, the estimated daily calorie expenditure is approximately 2,149 calories.

## FAQs?

**What is the Harris-Benedict equation?**- The Harris-Benedict equation is a formula used to estimate the Basal Metabolic Rate (BMR), which represents the number of calories your body needs at rest.

**Why is the PAL factor important?**- The PAL factor accounts for your activity level, providing a more accurate estimate of total daily calorie expenditure.

**Can the calculator be used for weight loss or gain?**- Yes, by adjusting your calorie intake relative to the calculated total calories burned, you can manage your weight.

## Conclusion:

The calories burned per day calculator is a valuable tool for anyone looking to maintain, lose, or gain weight. Understanding your daily energy expenditure allows for more informed decisions about diet and exercise. Remember, individual variations exist, and this calculator provides an estimate. It’s always advisable to consult with a healthcare professional or nutritionist for personalized advice.