Where these rates come from
Exchange rates are pulled live from Frankfurter, a free, open-source currency API that republishes official European Central Bank reference rates. The ECB publishes these once per business day (around 16:00 CET), so rates reflect the latest published business-day figure rather than real-time market pricing.
Why these are reference rates, not what you'll actually pay
Reference rates like these are the mid-market rate, not what a bank or exchange service will actually offer you - real-world conversions include a spread, so expect to receive or pay a slightly different amount than this calculator shows. The spread is how banks and exchange services make money on currency conversion, on top of any explicit fee they also charge.
Why rates only update once per business day
Unlike stock prices or cryptocurrency, which trade continuously, the ECB publishes its reference rates on a fixed daily schedule - this means the rate shown here stays the same throughout a given business day and over weekends, rather than fluctuating moment to moment the way a live trading platform's rate would.
Why only around 30 currencies are available
The underlying data source (the ECB) only publishes reference rates for major currencies it tracks as part of its official reporting - less commonly traded currencies simply aren't part of that published set, which is why the currency list here is limited to roughly 30 options rather than covering every currency in the world.