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Digital Image Resolution Converter
Result
... Dot per millimeter = ... Pixel per inch
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Dot per millimeter to Pixel per inch Converter
Use this page to convert dot per millimeter values into pixel per inch, with background details, formulas, a worked example, and a quick conversion table.
Conversion formula
1 dot/mm = 25.4 pixel/in
1 pixel/in = 0.0393700787401575 dot/mm
Example: 300 dot/mm = 7,620 pixel/in
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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
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 to Pixel per inch table
| Dot per millimeter [dot/mm] | Pixel per inch [pixel/in] |
|---|---|
| 0.01 dot/mm | 0.254 pixel/in |
| 0.1 dot/mm | 2.54 pixel/in |
| 1 dot/mm | 25.4 pixel/in |
| 2 dot/mm | 50.8 pixel/in |
| 5 dot/mm | 127 pixel/in |
| 10 dot/mm | 254 pixel/in |
| 20 dot/mm | 508 pixel/in |
| 50 dot/mm | 1,270 pixel/in |
| 100 dot/mm | 2,540 pixel/in |
Frequently asked questions
How many Pixel per inch (pixel/in) are in one Dot per millimeter (dot/mm)?
One Dot per millimeter equals 25.4 Pixel per inch.
How do you convert Dot per millimeter to Pixel per inch?
Multiply the Dot per millimeter value by 25.4 to get the result in Pixel per inch.
How do you convert Pixel per inch back to Dot per millimeter?
Multiply the Pixel per inch value by 0.0393700787401575 to get back to Dot per millimeter.
What is 300 Dot per millimeter in Pixel per inch?
300 Dot per millimeter equals 7,620 Pixel per inch.