Pica to Millimeter (pc to mm)
Convert pc to mm — Typography converter
One pica equals 4.233333 mm, so to convert picas to millimeters you multiply the value by 4.233333. A pica is larger than a millimeter — going the other way, 1 mm = 0.23622047 pc. For example, 10 pc = 42.333333 mm and 50 pc = 211.666667 mm.
1 pc = 4.233333 mm
Pica to Millimeter formula
1 Pica = 4.233333 mm
Worked examples
- 25 pc = 105.833333 mm
- 100 pc = 423.333333 mm
Pica to Millimeter conversion table
| Pica (pc) | Millimeter (mm) |
|---|---|
| 1 | 4.233333 |
| 8 | 33.866667 |
| 10 | 42.333333 |
| 11 | 46.566667 |
| 12 | 50.8 |
| 14 | 59.266667 |
| 16 | 67.733333 |
| 18 | 76.2 |
| 20 | 84.666667 |
| 24 | 101.6 |
| 32 | 135.466667 |
| 36 | 152.4 |
| 48 | 203.2 |
| 64 | 270.933333 |
| 72 | 304.8 |
Why 16 px equals 12 pt
Two fixed definitions drive every conversion on this page. A typographic point is 1/72 of an inch. A CSS reference pixel is 1/96 of an inch. That makes 1 px exactly 0.75 pt, and 16 px exactly 12 pt — which is why 16 px became the default body size on the web: it matches the 12 pt that print had already settled on.
A pica is 12 points, so 1 pica = 16 px. InDesign, Quark and most print workflows measure column widths and gutters in picas; CSS has no pica unit, so those measurements have to be converted before they reach a stylesheet. On this page, 1 pc = 4.233333 mm.
The CSS pixel is a reference unit, not a hardware pixel. On a 2× or 3× display, one CSS px still occupies 1/96 inch of visual space — the device simply renders it with more physical pixels. Converting CSS px to physical pixels requires the device pixel ratio, which is a separate calculation from anything on this page.
Metric print specs go through the inch: 1 in = 25.4 mm = 96 px = 72 pt. A 210 mm A4 page width is therefore about 794 px at 96 dpi — useful when matching a web layout to a printed one.
Frequently asked questions
How many millimeters are in one pica?
One pica equals 4.233333 millimeters (mm).
How many picas are in one millimeter?
One millimeter equals 0.23622047 picas (pc).
How do you convert picas to millimeters?
1 Pica = 4.233333 mm. Use the calculator above for any value.
What is 5 pc in mm?
5 pc = 21.166667 mm.
What is 100 pc in mm?
100 pc = 423.333333 mm.
What is 12 pc in mm?
12 pc = 50.8 mm.
What is 14 pc in mm?
14 pc = 59.266667 mm.
What is 16 pc in mm?
16 pc = 67.733333 mm.
What is 18 pc in mm?
18 pc = 76.2 mm.
What is 24 pc in mm?
24 pc = 101.6 mm.
Is a pica bigger than a millimeter?
Yes. A pica is larger — one pica equals 4.233333 millimeters (mm).