This is really simply tool for converting.
If you want to convert units each other with just one click, you can use this Opera Extension. This is made from http://www.digitaldutch.com/unitconverter/ which makes some changes on pages to get mobile viewing.
I have alos tried to contact for their permisson for using their codes as sending an e-mail but they not turned me yet. If they want make officiality for this ext., they can contact with me for adding their permission.