Convert css pixel to millimeter instantly. Type in either field — results update live.
Selected px values converted to mm using the exact factor from this tool.
| px | mm |
|---|---|
| 0.01 | 0.0026458333333 |
| 0.1 | 0.026458333333 |
| 1 | 0.26458333333 |
| 2 | 0.52916666667 |
| 3 | 0.79375 |
| 5 | 1.3229166667 |
| 10 | 2.6458333333 |
| 20 | 5.2916666667 |
| 50 | 13.2291666667 |
| 100 | 26.4583333333 |
| 1,000 | 264.5833333333 |
Exact conversion factors in both directions, plus a worked example.
1 px = 0.2645833333 mm
1 mm = 3.7795275591 px
To convert css pixel to millimeter, multiply by 0.2645833333.
To convert millimeter to css pixel, multiply by 3.7795275591.
Example: convert 10 px to mm
10 × 0.2645833333 = 2.6458333333 mm
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.
mm = px × 0.26458333333px = mm × 3.7795275591, using the same exact factors as this converter.