em unit

The em CSS length unit is a font-relative length equal to the specified font size. In an element with a 2 inch font, 1em equals 2 inches.

Compatibility

• Chrome 1 Released on 2008-12-11
• Chrome Android 18 Released on 2012-06-27
• Edge 12 Released on 2015-07-29
• Firefox 1 Released on 2004-11-09
• Firefox for Android 4 Released on 2011-03-29
• Safari 1 Released on 2003-06-23
• Safari on iOS 1 Released on 2007-06-29