Is This Retina?
Results
| Display density | PPI |
| Minimum distance from screen to reach target PPD (inches) | inches |
| Minimum distance from screen to reach target PPD (cm) | cm |
| Retina when used as phone (average viewing distance of 10~12 inches) | |
| Retina when used as laptop (average viewing distance of 14~20 inches) | |
| Retina when used as desktop (average viewing distance of 21~31 inches) |
This tool calculates how much distance you need to put between yourself and your device for it to look “Retina” (i.e. you can no longer tell the difference in quality), given the screen resolution and diagonal screen size.
Keep in mind that the display classifications use the upper bound (for example, the phone Retina display checks whether the required viewing distance is less than 12 inches).