Any Indian business that deals with international clients needs to give them a converted reference of the local rates. I've found this very useful, mainly for hotel websites. After searching for a simple widget to use on my own clients' websites, I finally decided to create my own. A currency converter is an important tool in showing value to a potential client, in a currency they understand. This currency conversion widget is simple to use, with just 2 lines to code to be pasted where you want the widget to be displayed on your website.
There is some optional customization included, which has been documented on the widget's page here - www.warrenasia.com/widgets/fx/
Note that these rates shouldn't be considered a final rate for transactions, because multiple market factors come into play, including FOREX markup, bank fees, etc.
I fetch rates from openexchangerates.org every hour. Here's their disclaimer, which applies to our widget as well:
The content on our site is provided for general information only. It is not intended to amount to advice on which you should rely. You must obtain professional or specialist advice before taking, or refraining from, any action on the basis of the content on our site. Although we make reasonable efforts to update the information on our site, we make no representations, warranties or guarantees, whether express or implied, that the content on our site or made available through our site is accurate, complete or up-to-date.