Online conversion rates

Normally every bank gives  conversion rates every half a minute or so , in most of the currencies. So - IF you have an access to such a trade room , you can be really online. Otherwise , you can bid/ask and get your "offer" for the moment , or watch in the WEB for example: http://www.bloomberg.com/markets/currencies/fxc.html

where you get the most important currencies

or : http://finance.yahoo.com/currency

Here is an article on the subject : How do you determine the natural online conversion rate for any product?

http://clickz.com/showPage.html?page=3393741

Here you have many categories , including currencies:

http://www.onlineconversion.com/

The universal currency converter: http://www.xe.com/ucc/

Wow sorry you were misled. I'm pretty sure you weren't asking about currency rate conversions.

Online conversions = number of visitors / number of them who take the action you want.

 For instance, let's say you're offering a an ebook on "how to date women"  and it sells for $10.

Of the 100 visitors who visit you site 2 actually purchase your ebook. Your conversion rate for the ebook sales is 100/2 or 2% (which is a typical conversion rate as of 2008).

The reason you want to know your conversion rate is because if you increase it you can get the more profit from the same 100 visitors, this gives you extra money to get more visitors.

Hope this helps.