🧮 Compound Interest Calculator 🧮

A simple web app to calculate compound interest written in vanilla JavaScript, HTML and CSS. My second intro to DOM manipulation.

How to view the calculator:

The web app is deployed on Azure Static Web Apps and can be viewed here!

To run as a container:

• Open Docker
• Run the build command:

docker run -d -p 8080:80 rzkw/calculator

To use the calculator:

1. Enter your principal amount in the 'Principal Amount ($)' field
2. Enter your annual interest rate in the 'Annual Interest Rate (%)' field
3. Enter how long the principal is being saved for in the 'Time Period (years)' field
4. Select how often interest compounds from the drop down selector, press Calculate

The results will be displayed in two segments: the Future Value of the principal and the Total Interest Earned.

Contributing:

If you'd like to contribute:

1. Fork my repository
2. Create new branch for your changes
3. Make your changes
4. Commit changes
5. Push changes to your forked repo
6. Submit pull request

Changelog:

0.1.0 Initial release
0.1.1 Containerised app 20/11/2025

Links and Resources:

• Reference code: compound calculator from jamezmca
• Docker for Web Developers: Getting Started with the Basics
• Building best practices
• Octopus Deploy: Using the NGINX Docker image
• Docker Blog: Setting non-root user

Contact:

Any questions/feedback/comments contact me through my website!