🇧🇬 🇪🇺 Change calculator to help people during Bulgaria's dual currency period in the transition to the EURO

A simple calculator to help Bulgarians during the Euro transition period. When you pay in Leva but receive change in Euro, this app tells you exactly how much you should get back.

Built with the help of AI to solve a real problem for real people.

Why?

From January 1, 2026, Bulgaria uses the Euro. During the transition:

• You can pay in both € and leva
• You get change only in Euro

This creates confusion: "I paid 20 leva for an €8 coffee... how much Euro change?"

Usage

1. Enter the price (defaults to €, tap to switch to leva)
2. Enter what you paid (defaults to leva, tap to switch to €)
3. See your change in both currencies

Fixed rate: €1 = 1.95583 leva

Run Locally

npm install
npm run dev

Tech

React 19 • TypeScript • Tailwind CSS 4 • Vite • Vitest (88 tests)

Contributing

This is an open source project. Suggestions, bug reports, and PRs are welcome! Every contribution will be reviewed.

License

MIT © Yusein Kerdakov