Digital Image Resolution Converter

About the digital image resolution converter

Digital image resolution describes how densely pixels or printer dots are packed into a unit of physical length. Print shops typically quote DPI (dots per inch), screen designers use PPI (pixels per inch), and metric specifications use dots per centimeter or per meter. The number controls how sharp the output looks at a given physical size: 300 DPI is the long-standing benchmark for high-quality print, while 72–96 PPI is the historical baseline for screens. This converter translates between the common density units used in design, prepress, and scanning workflows.

Frequently asked questions

• What is the difference between DPI and PPI? +

  PPI counts pixels (the digital samples in an image), while DPI counts the ink dots a printer lays down. They are often used interchangeably, but a printer typically uses many ink dots to reproduce a single pixel.

• Why is 300 DPI considered print quality? +

  At a normal reading distance, the human eye stops resolving individual dots above roughly 300 per inch, so prints at that density look continuous-toned.

• How do I convert DPI to dots per cm? +

  Divide DPI by 2.54. For example, 300 DPI ≈ 118 dots/cm, and 600 DPI ≈ 236 dots/cm.