Grid size in different screen resolutions


As there is more and more different screen resolutions out there, we are experiencing that grid size is getting an increasing problem.

Maybe we have a wrong, or slightly wrong, approach to calculating the size of the grid.

We use today textsize-data from the font used (very often default font), but in same resolutions this is not correct.

I would be very grateful if anyone could give some information on how they calculate the size of the grid, and maybe a short code sample.

Regards Dagl