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

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Welcome to the Time Calculator App, a modern and intuitive web-based tool designed to simplify time-related calculations. This application allows users to work efficiently with hours, minutes, and seconds by performing operations such as addition, subtraction, finding time differences, multiplication, and division. With a clean interface and responsive layout, the app focuses on usability and clarity, making time calculations easy to understand and accessible for users of all skill levels.

Built entirely with front-end web technologies, the Time Calculator App showcases practical implementation of HTML for structure, CSS for styling and responsiveness, and JavaScript for dynamic calculations and interactivity. The project emphasizes real-time results, smooth user interaction, and thoughtful features such as dark mode support, making it both a functional utility and a strong demonstration of modern web development practices.

You may also check this simple HTML, CSS and JavaScript project:

Key Features:

  • Add, subtract, and calculate the absolute difference between two time values

  • Multiply or divide time values for flexible time scaling

  • Real-time calculation with clear and readable results

  • Intuitive input fields for hours, minutes, and seconds

  • Interactive operation buttons with active state feedback

  • Dark mode toggle for improved user experience

  • Responsive layout suitable for desktop and mobile devices

Technologies Used:

  • HTML for structuring the application layout and input elements

  • CSS for modern styling, responsive design, and dark mode implementation

  • JavaScript for handling calculations, user interactions, and dynamic updates

  • Font Awesome for clean and recognizable interface icons

How to Use:

  • Enter the first time value using the hours, minutes, and seconds fields

  • Enter the second time value in the corresponding input fields

  • Select the desired operation such as add, subtract, difference, multiply, or divide

  • Click the Calculate button to display the computed time result

  • Use the Reset button to restore default values

  • Toggle dark mode using the icon button for a different visual experience

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:

Conclusion:

In conclusion, the Time Calculator App offers a simple yet powerful solution for managing and calculating time efficiently. By combining a user-friendly interface with accurate real-time calculations, responsive design, and interactive features, this application serves as both a practical tool and a showcase of modern web development skills using HTML, CSS, and JavaScript.

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

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 SourceCodester.com for viruses, but new viruses come out every day, so no prevention program can catch 100% of them.

FOR YOUR OWN SAFETY, PLEASE:

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.