Google Now Support Currency Conversion
Filed in: Google — July 7th, 2005
Google now support currency conversion. Try it.
No idea how many countries currencies are supported. As far as I tested, it support all countries’ currency that I can name(well, I know just a few 
).
No idea what is the currency of the country? Check out CIA site for country vs. currency list.
Note that the currency conversion rate is for reference only. The data is provided by CitiBank, as stated in the disclaimer.
If you are looking for serious(updates more often) currency conversion, try XE.com — the most popular online currency converter.
