Exchange rates

Hi.

Is there any online site where I can look at the exchange rates on Europe or/and USA/Canada?

Here there is an official control over the exchange rates and the official rate for US$ is 5.1ARG$ but this is just a way to hide the true; on the market the US$ is now at 8.5 but I'm sure that it is over valued due to the expectations. So, it would be interesting for me to know what would be the price if I would go to change my ARG$ in US or Europe: how much would they pay?
Thank you.
Juan.

 

I always use xe.com.

 

Yep! As good as any:
http://www.xe.com/currencyconverter/

 

Here another one

http://www.oanda.com/currency/converter/

 

Thank you very much!