Font Size Calculator is online conversion tool that allows you to convert
typographic units between various measurement systems e.g. Didot system (widely used
in Europe), Pica system (USA and UK) and PostScript (modern DTP system widely used in
digital printing and displaying). You can easily convert didot points to milimeters,
postscript points to inches, pica points to postscript points and so on.
Accuracy number of significant decimal digits
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Didot System - used in Europe except UK
1 point = 1p = 1/2660 m = 0.37594 mm
1 cicero (pica) = 1cc = 12 p = 12/2660 m = 4.511278 mm
Pica System - UK and USA
1 point = 1pt = 350/996 mm = 0.3514 mm
1 pica = 1pc = 12 pt = 4.216867 mm
PostScript - current DTP point system used e.g in CSS (Cascading Style Sheets).
1 point = 1pt = 1/72in (cala) = 0.3528 mm
1 pica = 1pc = 12pt= 1/6in (cala) = 4.233(3) mm
Note - font size in preview window depends on hardware and internet browser you use.