Image Resolution Converter — DPI, PPI, DPCM
Convert between 4 units of image resolution — DPI (dots per inch), PPI (pixels per inch), DPCM (dots per centimetre), and PPCM (pixels per centimetre). 300 DPI is the standard minimum for professional photo printing. Apple Retina displays use 220–460 PPI. Web images are typically 72–96 PPI. Medical pathology slides may require up to 40,000 DPI for cell-level detail.
About the Image Resolution Converter
Image resolution describes how many dots or pixels fit into a unit length, determining print quality and digital display sharpness. DPI (dots per inch) is used in printing; PPI (pixels per inch) describes screen density. A standard office print needs 300 DPI; web images are typically 72–96 PPI. High-DPI (Retina) smartphone screens reach 400–500 PPI, making individual pixels invisible to the naked eye at normal viewing distance.
- ›300 DPI is the standard minimum for professional photo printing
- ›Apple's Retina displays have 220–460 PPI depending on device
- ›72 PPI was the traditional web standard based on early Mac monitor resolution
- ›Medical imaging (pathology slides) may require up to 40,000 DPI for cell-level detail
Frequently Asked Questions
What units does the Image Resolution Converter — DPI, PPI, DPCM support?
The Image Resolution Converter — DPI, PPI, DPCM supports multiple units with instant conversion. Convert between 4 units of image resolution — DPI (dots per inch), PPI (pixels per inch), DPCM (dots per centimetre), and PPCM (pixels per centimetre). 300 DPI is the standard minimum for professional photo printing. Apple Retina displays use 220–460 PPI. Web images are typically 72–96 PPI. Medical pathology slides may require up to 40,000 DPI for cell-level detail. All results use SI-validated constants accurate to 8 significant figures.
Is this Image Resolution Converter — DPI, PPI, DPCM free?
Yes — completely free. No registration, no limits. Works on all devices including mobile.
How accurate is this converter?
Accurate to 8 significant figures using precise mathematical constants validated against international SI standards (NIST and ISO 80000).