I use this conversion program all the time... (area, distance, mass etc...) <br /><br />Simple and easy to use: (and free!)<br /><br /> http://www.ppe.com/convert.htm <br /><br />Google can also do the conversions, but you have to type what you are converting correctly, or it won't work.<br /><br />Example, try typing in Google:<br /><br />2000mg =<br /><br /><br />H.