Detect font size in pixels using jQuery [closed]

Question

How can I detect font size using jQuery? If I am using em and i need to detect font size in pixels

<h1 style="font-size: 5em">Size of font in pixels?</h1> 

Answer 1

http://jsfiddle.net/g9uKq/

I made you a fiddle just to be clear.

var size = $("h1").css('font-size');