points (pt) to mm Converter
Convert points (pt) to mm instantly with a reference conversion table.
| points (pt) | mm |
|---|
How to convert points (pt) to mm
Enter your value
Type the number of points (pt) you want to convert into the left box. The result in mm appears instantly in the right box. You can also type into the right box to convert in the other direction.
Use the swap button
Click the ⇄ Swap button to reverse the conversion — mm to points (pt). Your current value carries across so you don't have to re-enter anything.
About points (pt) and mm
The modern DTP point is fixed at exactly 1/72 of an inch, and since an inch equals exactly 25.4mm, one point works out to 0.352778mm. This precise but non-round factor exists because points were standardized to relate cleanly to inches and screen pixels, not to millimeters — so converting between the two systems always involves this recurring decimal rather than a tidy whole number.
Points and mm for print design and typesetting
Matching print specs to design software
Print briefs and press specifications from commercial printers are often given in millimeters (bleed, trim, margins), while page layout software like InDesign and Illustrator default to points and picas for type and spacing. Converting between the two is a routine step when handing off a design file to a print shop or when translating a printer's spec sheet into your layout software's units.
Rule thickness and stroke weight
Hairline rules and border strokes in professional print design are often specified in points (0.25pt to 1pt is typical for a fine line), but pre-press and printing equipment calibration is done in millimeters or microns. Knowing that a 0.5pt rule is about 0.176mm helps designers avoid strokes that are too thin to reproduce reliably on a commercial press.
Font size and line-height planning
Body text is typically set at 9-12pt (about 3.2-4.2mm cap height), while headings might run 18-36pt (about 6.3-12.7mm). When a client or brand guideline specifies a minimum legible text height in millimeters for packaging, signage, or accessibility compliance, converting that mm figure to points lets a designer set the correct font size directly in their layout software.
12 pt = 4.233mm. The typographer's standard body text size. 10pt ≈ 3.527mm. These mm values matter when designing for print — a text block specified in mm must translate back to points for the typesetter.
| points (pt) | mm |
|---|---|
| 1 | 0.3528 |
| 2 | 0.7056 |
| 4 | 1.411 |
| 6 | 2.117 |
| 8 | 2.822 |
| 9 | 3.175 |
Frequently asked questions
How do I convert points (pt) to mm?
To convert points (pt) to mm, multiply by 0.352778. Or use the calculator above for instant results.
How many mm are in 1 point (pt)?
1 point (pt) equals 0.352778 mm.
Is the points (pt) to mm converter free?
Yes, the points (pt) to mm converter is completely free with no sign-up required, no downloads, and it works offline once the page has loaded.
Why is a point 0.352778mm instead of a round number?
The modern DTP point was fixed at exactly 1/72 of an inch when Adobe standardized PostScript in 1982, and an inch equals exactly 25.4mm — so 1 point works out to 25.4 ÷ 72 = 0.352778mm. It relates cleanly to inches and pixels, not to millimeters.
Is a printer's point the same as a DTP point?
No. The traditional American printer's point was about 0.3514mm (1/72.27 inch), slightly different from the modern 0.352778mm DTP point. Old typesetting specs from before the 1980s may use this older, slightly smaller point size.
How many points are in a pica?
There are exactly 12 points in 1 pica, making a pica equal to about 4.2333mm. Picas are commonly used for column widths and page layout measurements, while points are used for font sizes and line spacing.
Why do font sizes use points instead of millimeters?
Points give finer, more practical control over small measurements than millimeters — a 1pt change (0.35mm) is a meaningful step in font size, whereas whole millimeters would be too coarse for typography's typical 6pt-96pt range.