Free App To Calculate Calories


Calculating your daily calorie needs is essential for maintaining a balanced diet and achieving your fitness goals. Our free app to calculate calories simplifies the process, making it easy for you to determine your daily energy requirements. In this article, we will guide you through using this tool effectively and understanding the science behind it.

Formula for Calculating Daily Calories

The calorie calculator employs the Harris-Benedict Equation, a widely accepted formula for estimating daily calorie needs. The formula is as follows:

Calories = (10 * weight) + (6.25 * height) – (5 * age) + 5 (for males)

Calories = (10 * weight) + (6.25 * height) – (5 * age) – 161 (for females)

This formula takes into account your weight (in kilograms), height (in centimeters), age (in years), gender, and activity level. The activity level is represented on a scale from 1.2 (sedentary) to 1.9 (extremely active).

How to Use

Our free app for calorie calculation is user-friendly and straightforward:

  1. Enter your weight in kilograms.
  2. Input your height in centimeters.
  3. Provide your age in years.
  4. Select your gender from the dropdown menu (male or female).
  5. Choose your activity level from the activity dropdown menu.
  6. Click the “Calculate” button.

The app will instantly compute your daily calorie needs based on the input data.


Let’s illustrate the app’s functionality with an example. Suppose you are a 30-year-old male, weighing 70 kg, standing at 170 cm, and leading a moderately active lifestyle (activity level 1.55). Using the Harris-Benedict Equation, the estimated daily calorie requirement would be:

Calories = (10 * 70) + (6.25 * 170) – (5 * 30) + 5 = 1732.5 calories per day.


1. What is the Harris-Benedict Equation? The Harris-Benedict Equation is a mathematical formula used to estimate an individual’s daily calorie needs based on weight, height, age, gender, and activity level.

2. Is the app suitable for weight loss or gain? Yes, you can use the app to determine your maintenance calories. To lose weight, create a calorie deficit, and to gain weight, create a calorie surplus.

3. How accurate is the app’s calculation? It provides a reasonable estimate, but individual factors such as metabolism and muscle mass can influence calorie needs.

4. Can I use the app for children or elderly individuals? The app is primarily designed for adults, so it may not provide accurate results for children or elderly individuals.

5. What is the significance of the activity level in the equation? The activity level accounts for the energy expended through physical activity, which varies from sedentary to extremely active.


Our free app to calculate calories is a valuable tool for anyone looking to better understand their daily calorie requirements. By inputting your weight, height, age, gender, and activity level, you can get an estimate of the calories your body needs to function optimally. However, it’s important to remember that this is a general estimate, and individual factors may affect your actual calorie needs. Consult a healthcare professional or nutritionist for personalized guidance on your calorie intake.

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