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davidl72327298
Known Participant
March 3, 2023
Question

How do I change pixel/mm to dpi in Acrobat Object Inspector?

  • March 3, 2023
  • 1 reply
  • 3503 views

Hey there,

I just wanted to check the resolution of an image in a PDF-file and the object inspector showed the resolution in pixel per mm (pixel/mm), which is absolute horsepoo. How do I change that in dpi?

Thanks!

    This topic has been closed for replies.

    1 reply

    Abambo
    Community Expert
    AbamboCommunity Expert
    Community Expert
    March 5, 2023

    Why is that horsepoo?

     

    Inch and mm are units, so try changing the unit from mm to inch. All your measures will be in inches then.

     

    I'm on PC, so it's for me under Edit→Preferences.

     

    You can also simply multiply the value by 25.4 (one inch is 25.4 mm)

    ABAMBO | Hard- and Software Engineer | Photographer
    D
    davidl72327298Author
    Known Participant
    March 6, 2023

    It is, because the common, established unit for print resolution is dpi and not pixel per millimeter, but for everything else we do use the metric system. So using inches instead of mm in general is not an option. Were american developers involved, who are blind on that eye?

    markd66074679
    markd66074679
    Inspiring
    July 6, 2023

    'Officially' it's ppi (pixels per inch) and not dpi (dots per inch). Dpi refers to the physical dots of ink per inch on a printed or scanned image. But thanks for the Edit > Preferences tip, i was looking for the same thing!-)

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