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Light Converters
Digital Image Resolution Converter
Result
... Pixel per inch = ... Dot per millimeter
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Pixel per inch to Dot per millimeter Converter
Use this page to convert pixel per inch values into dot per millimeter, with background details, formulas, a worked example, and a quick conversion table.
Conversion formula
1 pixel/in = 0.0393700787401575 dot/mm
1 dot/mm = 25.4 pixel/in
Example: 300 pixel/in = 11.8110236220472 dot/mm
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Pixel per inch
One pixel per inch is equal to 1 / 0.0254 dots per meter.
History: Pixels per inch became common with digital displays and raster image workflows.
Current use: Used for displays, image export settings, UI design, photography, and print preparation.
Also written as pixel/in, ppi, pixels per inch.
Dot per millimeter
One dot per millimeter is equal to 1000 dots per meter.
History: Millimeter-based resolution units are practical for compact imaging and print measurements.
Current use: Used for scanning, microscopy, print production, and compact-device resolution references.
Also written as dot/mm, dots per millimeter, dots per millimetre.
Pixel per inch to Dot per millimeter table
| Pixel per inch [pixel/in] | Dot per millimeter [dot/mm] |
|---|---|
| 0.01 pixel/in | 0.000393700787401575 dot/mm |
| 0.1 pixel/in | 0.00393700787401575 dot/mm |
| 1 pixel/in | 0.0393700787401575 dot/mm |
| 2 pixel/in | 0.078740157480315 dot/mm |
| 5 pixel/in | 0.196850393700787 dot/mm |
| 10 pixel/in | 0.393700787401575 dot/mm |
| 20 pixel/in | 0.78740157480315 dot/mm |
| 50 pixel/in | 1.96850393700787 dot/mm |
| 100 pixel/in | 3.93700787401575 dot/mm |
Frequently asked questions
How many Dot per millimeter (dot/mm) are in one Pixel per inch (pixel/in)?
One Pixel per inch equals 0.0393700787401575 Dot per millimeter.
How do you convert Pixel per inch to Dot per millimeter?
Multiply the Pixel per inch value by 0.0393700787401575 to get the result in Dot per millimeter.
How do you convert Dot per millimeter back to Pixel per inch?
Multiply the Dot per millimeter value by 25.4 to get back to Pixel per inch.
What is 300 Pixel per inch in Dot per millimeter?
300 Pixel per inch equals 11.8110236220472 Dot per millimeter.