Conversion rate of pt, em, px, percent, other

Question

More so than less I run into times when I need to use pt instead of px or em instead of pt, or whatever the case, and trying to find the right size for something bigger than

Answer 1

To make a web site truely open for all, you need to get rid of points and pixels. You need those measurements to be relative. Hence percents and ems.

That is the best way to go.

Lots of people (customers) has a variety of eyesight problems.

Why make a web site that those people cannot easily use?

(Variety of standards address these problems)