Convert millimeter to css pixel instantly. Type in either field — results update live.
Selected mm values converted to px using the exact factor from this tool.
| mm | px |
|---|---|
| 0.01 | 0.037795275591 |
| 0.1 | 0.37795275591 |
| 1 | 3.7795275591 |
| 2 | 7.5590551181 |
| 3 | 11.3385826772 |
| 5 | 18.8976377953 |
| 10 | 37.7952755906 |
| 20 | 75.5905511811 |
| 50 | 188.9763779528 |
| 100 | 377.9527559055 |
| 1,000 | 3,779.5275590551 |
Exact conversion factors in both directions, plus a worked example.
1 mm = 3.7795275591 px
1 px = 0.2645833333 mm
To convert millimeter to css pixel, multiply by 3.7795275591.
To convert css pixel to millimeter, multiply by 0.2645833333.
Example: convert 15 mm to px
15 × 3.7795275591 = 56.6929133858 px
Short background on the units used in this conversion.
The CSS pixel (px) is the CSS reference pixel — defined as 1/96 of an inch under the CSS spec, not a physical screen pixel.
CSS pixels size web layouts, font-size declarations, and design-tool exports at the standard 96 px per inch reference.
px = mm × 3.7795275591mm = px × 0.26458333333, using the same exact factors as this converter.