converter forex is how to make trading more easy to estimated potition, so many tools we can make for converter forex, ex: Universal Currency Converter. this tool we can get on www.xe.com all of currency on the world can we conver whit this converter tool. like EUR - US, US - EUR, JPY-US, etc.
another tool, on dukascopy.com, they are give complete tool for currency system. 
OANDA Currency Converter, also make tool on they are site.
we know all of the broker company give some tool to make easy forex trading, so you can just cose what do you want to get on they forex tool, an where te easyest for your brain :)