Compound Interest Calculator Using HTML, CSS and JavaScript with Source Code


Welcome to our Compound Interest Calculator project, a powerful tool designed to help you understand the potential growth of your investments over time. With just a few simple inputs, this calculator enables you to estimate the compound interest earned on your savings or investments. Whether you're planning for retirement, saving for a major purchase, or simply exploring investment opportunities, our calculator provides valuable insights into how your money can work for you.

Built using HTML, CSS, and JavaScript, our calculator boasts a user-friendly interface and real-time calculation capabilities. You can input the principal amount, interest rate, number of years, and choose between monthly or yearly compounding frequencies. Upon clicking the "Calculate" button, the calculator instantly computes and displays the total amount accrued and the interest earned, allowing you to make informed financial decisions. Experience the convenience and efficiency of our Compound Interest Calculator as you embark on your journey towards financial empowerment and wealth accumulation.

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


  1. User-Friendly Interface: The calculator has a clean and intuitive interface, making it easy to input your investment details.
  2. Real-Time Calculation: As soon as you input the principal amount, interest rate, number of years, and compounding frequency, the calculator instantly calculates and displays the compound interest.
  3. Flexible Compounding Frequency: You can choose between monthly and yearly compounding frequencies to see how different frequencies affect your returns.
  4. Responsive Design: The calculator is responsive and works well across different devices and screen sizes.
  5. Easy to Use: Simply fill in the required fields and click the "Calculate" button to get your compound interest results.

Technologies Used:

  1. HTML: Used for creating the structure and layout of the web page.
  2. CSS: Styles the HTML elements to enhance visual appeal and user experience.
  3. JavaScript: Adds interactivity to the calculator, performs calculations based on user inputs, and updates the result dynamically.
  4. Bootstrap 4: Utilized for responsive design and pre-styled components, making the calculator visually appealing and easy to use.
  5. Google Fonts: Incorporates the 'Lato' font from Google Fonts to enhance typography.

How to Use:

  1. Input Details: Enter the principal amount, interest rate, number of years, and select the compounding frequency (monthly or yearly).
  2. Click Calculate: After filling in the required fields, click the "Calculate" button.
  3. View Results: The calculator will display the total amount accumulated and the interest earned over the specified period.
  4. Calculate Again: If you want to perform another calculation, simply click the "Calculate Again" button, and the form will reset for your next input.

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 Setup/Installation:


In conclusion, our Compound Interest Calculator provides a convenient and efficient way to estimate the growth of your investments over time. With its intuitive interface, real-time calculation capabilities, and flexibility in compounding frequency, our calculator empowers users to make informed financial decisions and plan for their future with confidence. Whether you're a seasoned investor or just starting on your financial journey, our calculator serves as a valuable tool for understanding the power of compound interest and maximizing the potential returns on your savings or investments. Take control of your finances today and unlock the possibilities of wealth accumulation with our Compound Interest Calculator.

That's it! I hope this "Compound Interest 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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