Font size in pixels

Question

On an iPhone how do I calculate the size of a character in pixels for a given point size?

Answer 1

You can't reliably convert points to pixels as the ppi (points-per-inch) will change from monitor to monitor. Have a read;

http://hsivonen.iki.fi/units/

Convert Pixels to Points

That said, some people have put together a few reference tables and calculators that may get you started;

http://www.unitconversion.org/typography/postscript-points-to-pixels-x-conversion.html

http://sureshjain.wordpress.com/2007/07/06/53/