Difference between Dots Per Inch (DPI) and Pixels Per Inch (PPI)?
The terms Dots Per Inch (DPI) and Pixels Per Inch (PPI) are commonly used interchangeably to describe the resolution of an image. However, the terms do not mean the same thing and there are distinct differences between the two: • DPI refers to the number of printed dots contained within one inch of an image printed by a printer. • PPI refers to the number of pixels contained within one inch of an image displayed on a computer monitor. Much of the confusion between these two terms happens for a couple of reasons. First, even though PPI refers to the resolution of an on-screen digital image, it can also affect the quality of the final printed picture. Second, even some professional print services request that pictures must be at a certain DPI level before they can be printed; what they normally mean is PPI, not DPI – thus, this adds to the confusion. The term DPI is a method to determine the print size of an image on paper. Although some printing applications still use DPI, many newer pr
