Millimeter to Pixel (mm to px)
Convert mm to px — Typography converter
One millimeter equals 3.779528 px, so to convert millimeters to pixels you multiply the value by 3.779528. A millimeter is larger than a pixel — going the other way, 1 px = 0.26458333 mm. For example, 10 mm = 37.795276 px and 50 mm = 188.976378 px.
1 mm = 3.779528 px
Millimeter to Pixel formula
1 Millimeter = 3.779528 px
Worked examples
- 25 mm = 94.488189 px
- 100 mm = 377.952756 px
Millimeter to Pixel conversion table
| Millimeter (mm) | Pixel (px) |
|---|---|
| 1 | 3.779528 |
| 8 | 30.23622 |
| 10 | 37.795276 |
| 11 | 41.574803 |
| 12 | 45.354331 |
| 14 | 52.913386 |
| 16 | 60.472441 |
| 18 | 68.031496 |
| 20 | 75.590551 |
| 24 | 90.708661 |
| 32 | 120.944882 |
| 36 | 136.062992 |
| 48 | 181.417323 |
| 64 | 241.889764 |
| 72 | 272.125984 |
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 mm = 3.779528 px.
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 pixels are in one millimeter?
One millimeter equals 3.779528 pixels (px).
How many millimeters are in one pixel?
One pixel equals 0.26458333 millimeters (mm).
How do you convert millimeters to pixels?
1 Millimeter = 3.779528 px. Use the calculator above for any value.
What is 5 mm in px?
5 mm = 18.897638 px.
What is 100 mm in px?
100 mm = 377.952756 px.
What is 12 mm in px?
12 mm = 45.354331 px.
What is 14 mm in px?
14 mm = 52.913386 px.
What is 16 mm in px?
16 mm = 60.472441 px.
What is 18 mm in px?
18 mm = 68.031496 px.
What is 24 mm in px?
24 mm = 90.708661 px.
Is a millimeter bigger than a pixel?
Yes. A millimeter is larger — one millimeter equals 3.779528 pixels (px).