Mm To Points Calculator

Convert millimeters, centimeters, or inches to DTP, TeX, or Didot points, and find paper size dimensions like A4 or Letter in points.

Enter millimeters to convert to typographic points.

Single length

Width × height

Length

Point standard

Common size Width

Height

Point standard

Mm to Points Formula

pt = mm / k

pt = length in points
mm = length in millimeters
k = mm per point for the chosen point system

The constant k depends on which point standard you select:

DTP/CSS point: k = 25.4 / 72 ≈ 0.35278 mm
TeX point: k = 25.4 / 72.27 ≈ 0.35146 mm
Didot point: k = 0.376 mm

For width × height, apply the formula to each dimension separately. If your input is in centimeters or inches, convert first: 1 cm = 10 mm and 1 in = 25.4 mm.

Reference Tables

Quick conversions using the DTP/CSS point (the standard for CSS, PDF, Adobe, and Microsoft Office).

Millimeters	DTP points	TeX points	Didot points
1 mm	2.835	2.845	2.660
5 mm	14.173	14.226	13.298
10 mm	28.346	28.453	26.596
25 mm	70.866	71.131	66.489
50 mm	141.732	142.263	132.979
100 mm	283.465	284.527	265.957

Common page sizes converted to DTP points.

Page	Millimeters	Points (W × H)
A4	210 × 297	595 × 842
A5	148 × 210	420 × 595
A3	297 × 420	842 × 1191
Letter	215.9 × 279.4	612 × 792
Legal	215.9 × 355.6	612 × 1008
Business card	90 × 50	255 × 142

Worked Example and FAQ

Example: Convert 12 mm to DTP points.

pt = 12 / (25.4 / 72) = 12 / 0.35278 = 34.016 pt

Which point standard should you use? Use DTP/CSS for web design, PDFs, Word, InDesign, and Illustrator. Use TeX points if you are working in LaTeX. Use Didot only for traditional European print work.

Are PostScript points the same as DTP points? Yes. PostScript and CSS both define 72 points per inch, so the values match.

How do you convert points back to mm? Multiply points by k. For DTP points, mm = pt × 0.35278.

What is a pica? One pica equals 12 points. A 72-point measurement is 6 picas, or 1 inch in the DTP system.