Bū tools
Currencies
At the European Central Bank rates.
What it does
Converts an amount between 30 currencies, at the reference rates of the European Central Bank.
- Type the amount, pick the currencies (or a shortcut), ⇅ swaps them. Tap the result to copy it.
- On the right, the common amounts already converted.
- The rates are kept on your device, with their date: offline, the tool uses the last ones.
Good to know
The ECB publishes its rates on working days around 4 pm (Frankfurt time): on weekends, you get Friday’s. They’re reference rates: your bank or card adds its own margin.
The rates come from Frankfurter (frankfurter.dev), a free service that republishes the ECB rates. The app only asks it for today’s rates: your amount is never sent, the conversion happens on your device.
Free, no account, nothing is sent: it runs in your browser, even offline.
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