HTML Font Size Conversion

Whilst getting rid of font tags today, I needed an easy reference point to find what size rating in one coding format was equivalent to another (Eg: Is <font size="1"> the same as <span style = "font-size: 8px;"> or... ?) and came across this fantastic chart!

http://www.trishasdesignstudio.com/font-size-conversion-chart.asp

As the link died, here is a version of it hosted on imgur.