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Swap between major currencies using the European Central Bank reference rates exposed by the open-source Frankfurter API. Rates update once per business day (around 16:00 CET) and conversions are routed through EUR for consistency.
Use this converter for quick cross-currency checks without worrying about API keys. The app requests the latest available ECB rates and shows when they were published so you know which day the pricing reflects.
Jump directly to any available converter for currency converter & fx reference units.
Every unit below references the SI base value so you can compare readings quickly.
| Unit | Symbol | 1 unit in EUR | Notes |
|---|---|---|---|
| Euro | EUR | See formulas below | — |
| US Dollar | USD | See formulas below | — |
| British Pound | GBP | See formulas below | — |
| Swiss Franc | CHF | See formulas below | — |
| Japanese Yen | JPY | See formulas below | — |
| Polish Zloty | PLN | See formulas below | — |
| Canadian Dollar | CAD | See formulas below | — |
| Australian Dollar | AUD | See formulas below | — |
| New Zealand Dollar | NZD | See formulas below | — |
| Swedish Krona | SEK | See formulas below | — |
| Norwegian Krone | NOK | See formulas below | — |
| Danish Krone | DKK | See formulas below | — |
Frankfurter mirrors the ECB feed, which updates once per working day (typically ~16:00 CET). The app fetches fresh data once per day and shows the published date.
Rates are published with EUR as the base. Cross conversions (e.g., USD → AUD) are computed through EUR to keep every pair internally consistent.
Yes. Frankfurter provides a Docker image. Point the app’s FX base URL to your self-hosted instance if you need full control or offline capability.
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