Converting from Point Didot (dd) to Pica Postscript (pi) | Typography

What is Point Didot (dd)

Point Didot (dd) is a unit of measurement commonly used in typography to determine font sizes and spacing. It is based on the Didot point system, named after the famous French printing family.

What is Pica Postscript (pi)

Pica Postscript (pi) is another unit of measurement in typography, often used in digital typesetting. It is derived from the PostScript page description language developed by Adobe Systems.

Conversion Formulas

The default conversion rate between Point Didot (dd) and Pica Postscript (pi) is as follows:

• 1 (dd) = 0.08880472 (pi)
• 1 (pi) = 11.26066 (dd)

Additional conversion examples include:

• 6 (dd) = 0.5328283 (pi) or 6 (pi) = 67.56397 (dd)
• 15 (dd) = 1.332071 (pi) or 15 (pi) = 168.9099 (dd)
• 4 (dd) = 0.3552189 (pi) or 4 (pi) = 45.04265 (dd)

Examples

10(dd)=0.8880472(pi)

3(pi)=33.78198(dd)

20(dd)=1.7760944(pi)

Use these formulas to conveniently convert between Point Didot (dd) and Pica Postscript (pi) measurements in your typography projects.