Real-time currency conversion can definitely be a challenge with all the fluctuations. I’ve been using FXConvert
https://fxconvert.net/ , and it’s been fantastic. They have a really reliable currency calculator that gives you up-to-date conversion rates. For example, if you need to convert USD to EUR, you just enter the amount, and it shows you the exact conversion based on the latest rates. The best part is that it updates the rates every day, so you always get accurate information. It’s been super helpful for me. Check it out and see if it works for you!