Because I work with a lot of currencies and I used to do a lot of multi-currency calculations, I’ve built a convertor (https://4ex.ro) that accepts formulas and displays the results in all selected currencies. The rate is the one offered by the National Bank in Romania (a legal requirement for transactions that happen between companies in Romania - maybe I’ll add different data sources in the future). Oh, and you can add a formula in one field and then continue in another field using the previous result. Something really easy to accomplish, but there was no solution doing this a few years ago. Almost nobody is using it, but I do and this is a sufficient reason to keep it (a)live.