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Picas to Millimeters Converter.

Convert PostScript picas to millimeters for page-layout measurements.

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Millimeters: 4.233333333333

Millimeters

0.000000000000

One PostScript pica is 12 PostScript points (4.233333… mm).

FAQs

How does the picas to millimeters converter work?

One PostScript pica is 12 PostScript points (4.233333… mm).

Use Cases

Page Layout Design

Convert pica-based measurements from design software to millimeters for print production or when communicating with printers.

Example: Convert a 12-pica margin to millimeters: 12 × 4.2333 = 50.8 mm.

Prepress and Print Specification

Ensure accurate physical dimensions when setting up print files or verifying layout specifications in millimeters.

Example: Check that a 6-pica column width equals 25.4 mm.

Frequently Asked Questions

How many millimeters are in one PostScript pica?
One PostScript pica is exactly 4.2333 millimeters. This is based on the standard that 1 pica = 1/6 inch and 1 inch = 25.4 mm, so 25.4/6 = 4.2333 mm.
What is the difference between a PostScript pica and a traditional pica?
A PostScript pica is exactly 1/6 inch (4.2333 mm), used in digital page layout. Traditional picas (like in typography) may vary slightly, but PostScript picas are the standard in modern software like Adobe InDesign.
Can I use this converter for print design measurements?
Yes, this converter is ideal for print design. It helps you convert pica-based measurements (common in layout software) to millimeters, which are often used in print specifications and physical measurements.

Tips & Common Mistakes

Tips

  • Remember that 1 pica = 4.2333 mm, so multiply the number of picas by 4.2333 to get millimeters.
  • For quick estimates, you can round to 4.23 mm per pica, but for precise print work use the exact value.
  • Double-check your input: ensure you are entering picas, not points (1 pica = 12 points).
  • Use this converter when switching between software that uses picas and specifications that require millimeters.

Common Mistakes to Avoid

  • Confusing picas with points: 1 pica = 12 points, so entering points as picas will give incorrect results.
  • Using a rounded conversion factor like 4.2 mm instead of the exact 4.2333 mm, which can cause small errors in precise layouts.
  • Forgetting that this converter is for PostScript picas, not traditional typographic picas that may have slightly different values.

Last updated: August 13, 2026