Partial Truth:
Amazon charges 10 cents to convert a document.
Whole Truth:
Amazon does not charge for conversion, the charge would be to send the converted document to your Kindle via Whispernet. Rather than charging for each document, they will wait until you've accumulated $3.00 in charges before charging your credit card.
To date no one had been charged for this service but that does not mean it won't happen in the future.
To convert documents you may send to Amazon for conversion using
yourkindlename@kindle.com.
You also have the option of having the document sent back to via email so that you can transfer it to your Kindle "documents" folder with the USB cable. There is no charge for this. Use
yourkindlename@free.kindle.com.
You may also skip Amazon's conversion service and do it yourself with free software.
- MobiPocket Creator - Windows only (install as the Publisher's Edition, get MobiPocket Reader while you're at it to test your conversions)
- Stanza - Windows and Mac
- Calibre - Windows, Mac and Linux (a big plus is the creator Kovid is a MobileRead member and regular poster)