I built a simple interest calculator as a small side project to practice handling user inputs and calculation logic using vanilla JavaScript. The goal was to keep it clean, simple, and easy to use. Calculates simple interest instantly Clean and minimal UI Responsive layout for mobile Built using HTML, CSS, and vanilla JS Many interest calculators online try to do too much at once. I wanted a focused tool that: Does one thing well Is easy to understand Can be reused in small projects HTML for form inputs and structure CSS for spacing, layout, and responsiveness JavaScript for:

Interest calculation logic Input validation Real-time result updates No formulas. No math lecture. Live demo: (https://yuvronixstudio.github.io/interest-calculator/) Source code: (https://github.com/YuvronixStudio/interest-calculator/) Simpler tools are easier to test and improve Clear input labels reduce user errors Small projects are great for sharpening fundamentals I’m continuing to build small, practical web tools Feedback or suggestions are welcome.