Millimeter to Pixel (CSS) Converter
1 millimeter is about 3.779527559 CSS pixels. Convert millimeters (mm) to CSS pixels (px) below: type a value and the result updates as you type.
mm to px calculator
Result
Millimeter to Pixel (CSS) conversion
1 mm ≈ 3.779527559 pxone millimeter in CSS pixels
1 px ≈ 0.2645833333 mmone CSS pixel in millimeters
Millimeter (mm): One thousandth of a meter.
Pixel (CSS) (px): The CSS reference pixel: exactly 1/96 inch, or 0.75 point. Real screen pixels vary in size.
Source:Millimeter: SI Brochure, 9th edition (BIPM, 2019); Pixel (CSS): W3C CSS Values and Units Module Level 3 (absolute lengths)
How to convert millimeters to CSS pixels
To convert millimeters to CSS pixels, multiply the number of millimeters by about 3.779527559.
Formula
px = mm × 3.779527559
The factor is rounded here. The calculator uses the exact value.
Examples
- 5 mm = 5 × 3.779527559 ≈ 18.8976378 px
- 25 mm = 25 × 3.779527559 ≈ 94.48818898 px
- 100 mm = 100 × 3.779527559 ≈ 377.9527559 px
Millimeter to Pixel (CSS) conversion table
| Millimeter (mm) | Pixel (CSS) (px) |
|---|---|
| 0.1 mm | 0.3779527559 px |
| 0.5 mm | 1.88976378 px |
| 1 mm | 3.779527559 px |
| 2 mm | 7.559055118 px |
| 3 mm | 11.33858268 px |
| 5 mm | 18.8976378 px |
| 10 mm | 37.79527559 px |
| 20 mm | 75.59055118 px |
| 25 mm | 94.48818898 px |
| 50 mm | 188.976378 px |
| 100 mm | 377.9527559 px |
| 250 mm | 944.8818898 px |
| 500 mm | 1889.76378 px |
| 1000 mm | 3779.527559 px |
Values rounded to 10 significant digits where needed.
Frequently asked questions
- How many CSS pixels are in one millimeter?
- One millimeter is about 3.779527559 CSS pixels.
- How do I convert CSS pixels to millimeters?
- To convert CSS pixels to millimeters, multiply the number of CSS pixels by about 0.2645833333. The formula is mm = px × 0.2645833333.
- Is this conversion exact?
- Yes. Both units have exact definitions, but the factor has more decimal places than can be shown, so displayed results are rounded. The calculator works with 50 significant digits before rounding.
- Which is larger, a millimeter or a CSS pixel?
- A millimeter is about 3.779527559 times larger than a CSS pixel. In other words, a CSS pixel is about 0.2645833333 of a millimeter.