This is a very good article on how PPI (pixels in an image) to DPI (dots per inch(printer)) works.


Also remember that pixels are not all equal, pixels of original resolution are better than enlarged resized and manipulated pixels, and JPG is always a distortion problem if you later resize, use transparency or in other ways choose to manipulate. Never use jpg to save original work if you can avoid it.

Basic rule is 150 to 300 PPI image to print from good to photo quality which equals 600 to 2400 DPI.

When scanning reverse the process, scan DPI / 4 (apx)= PPI.

Journal Comments

  • toby snelgrove  IPA
  • Dominic Melfi
  • Dominic Melfi