Use this Python library to convert amounts of nearly any currency into dollars.
$$$ uses the Open Exchange Rates currency data API as a backend. It caches the rates for you, and pulls in the new values hourly so that your data will never be older than < 2 hours. For that, you will be able to use the free plan.
Here's how to use it:
$ pip install dollars
$ export OXR_APP_ID=... # Your freely achieved app id
$ ipython
In [1]: from dollars import dollar
In [2]: dollar('EUR', 5)
Out[2]: 5.271147845154761
Stop worrying, and start converting!