PXtoEM.com: PX to EM conversion made simple.

• http://pxtoem.com/
• http://pxtoem.com/
• http://en.wikipedia.org/wiki/Em_(typography)
• https://developer.mozilla.org/en/CSS-2_Quick_Reference/Units
• http://www.alistapart.com/articles/howtosizetextincss/
• http://www.informit.com/articles/article.aspx?p=397663
• http://jontangerine.com/log/2007/09/the-incredible-em-and-elastic-layouts-with-css
• http://www.thesug.org/blogs/kyles/Lists/Posts/Post.aspx?List=89c8858b%2D90d2%2D4750%2Da11a%2De599248e6c69&ID=22
• http://www.blueprintcss.org/
• http://briancray.com/