Calorie Calculator App Using HTML, CSS and JavaScript with Source Code


Welcome to the Calorie Calculator App, a user-friendly tool designed to help individuals better understand their daily energy requirements. With an intuitive interface and robust functionality, this web-based application empowers users to make informed decisions about their diet and nutrition. By simply inputting their gender, age, height, and weight, users can access personalized calorie estimates tailored to their unique physiological characteristics.

Powered by HTML, CSS, and JavaScript, the Calorie Calculator App boasts a seamless integration of technology and nutrition science. Leveraging the Harris-Benedict equation, the app calculates Basal Metabolic Rate (BMR) to provide users with an estimate of the calories needed to maintain, lose, or gain weight. Whether users are embarking on a fitness journey or seeking to improve their overall health, this versatile tool equips them with the insights necessary to achieve their dietary goals. With its responsive design and stylish interface, the Calorie Calculator App offers a modern solution for individuals seeking to optimize their nutritional intake and promote a balanced lifestyle.

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  1. Gender Selection: Users can choose their gender from the dropdown menu, ensuring accurate calorie estimation based on biological differences.
  2. Input Fields: Easily input your age, height, and weight into designated fields for personalized calculations.
  3. Calculation Button: A simple "Calculate" button triggers the app to process the provided information and deliver the estimated daily calorie needs.

Technologies Used:

  1. HTML: The structure of the web application is defined using HTML, providing the framework for content organization and user interface elements.
  2. CSS: Cascading Style Sheets (CSS) are utilized to enhance the visual presentation of the app, including layout, colors, typography, and overall aesthetics.
  3. JavaScript: The functionality of the calorie calculator is implemented using JavaScript, allowing for dynamic interaction with user inputs and real-time calculations.
  4. Bootstrap: Bootstrap, a popular front-end framework, is integrated to leverage its pre-designed components and responsive grid system, streamlining the development process and enhancing the app's responsiveness.

How to Use:

  1. Access the App: Simply open the Calorie Calculator App in any web browser on your desktop or mobile device.
  2. Provide Information: Fill in the required fields including gender, age, height, and weight.
  3. Initiate Calculation: Click on the "Calculate" button to trigger the app to process your input data.
  4. View Results: The estimated daily calorie needs will be displayed below the input form, providing valuable insights into your nutritional requirements.

Sample Screenshots of the Project:

Landing Page

Sample Calculation

How to Run?

  • Download the provided source code zip file.
  • Extract the downloaded zip file.
  • Open the html file and you are now ready to go!

Video Demonstration for Installation/Setup:


In conclusion, the Calorie Calculator App stands as a valuable resource in the realm of health and wellness, offering a convenient and accessible means for users to monitor and manage their calorie intake. By harnessing the power of technology and nutritional science, this app facilitates informed decision-making and empowers individuals to take control of their dietary habits. Whether users are striving for weight management, performance enhancement, or overall well-being, the Calorie Calculator App serves as a reliable companion on their journey towards optimal health. With its user-friendly interface, accurate calculations, and responsive design, this app exemplifies the intersection of innovation and practicality in promoting a healthier lifestyle for all.

That's it! I hope this "Calorie Calculator Using HTML, CSS and JavaScript" will assist you on your programming journey, providing value to your current and upcoming projects.

For additional tutorials and free source codes, explore our website.

Enjoy Coding :>>

Note: Due to the size or complexity of this submission, the author has submitted it as a .zip file to shorten your download time. After downloading it, you will need a program like Winzip to decompress it.

Virus note: All files are scanned once-a-day by for viruses, but new viruses come out every day, so no prevention program can catch 100% of them.


1. Re-scan downloaded files using your personal virus checker before using it.
2. NEVER, EVER run compiled files (.exe's, .ocx's, .dll's etc.)--only run source code.

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