Font Size (Type Size) Conversion

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
Metric System
milimeter [mm] meter [m]
Didot System
point [p,dd] cicero [cc] canon
PostScript (current DTP)
point [pt,bp] pica [pi,pc] canon
Imperial Units
inch [in] foot [ft]
Pica System
point [pt] pica [pc,pi] pica [pc,pi] canon
Typographic Units Systems
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.