Monitor PPI Calculator
Calculate pixels per inch (PPI) from screen size and resolution.
Enter diagonal size and resolution for instant PPI calculation.
Enter screen size and resolution — see PPI instantly.
Display Density
PPI (Pixels Per Inch) measures how sharp a display looks.
Formula: PPI = sqrt(width_pixels squared + height_pixels squared) / diagonal_inches
Common resolutions and their PPI:
| Resolution | Name | 24" PPI | 27" PPI | 32" PPI |
|---|---|---|---|---|
| 1920x1080 | 1080p | 92 | 82 | 69 |
| 2560x1440 | 1440p | 122 | 109 | 92 |
| 3840x2160 | 4K | 184 | 163 | 138 |
| 5120x2880 | 5K | 245 | 218 | 184 |
What PPI looks good?
- Desktop monitor (arm’s length): 90-110 PPI is standard
- Retina/HiDPI: above 200 PPI (text looks very sharp)
- Smartphone: 300-500+ PPI
- Printed page: 300 DPI is standard print quality
Apple Retina thresholds:
- iPhone: 326 PPI (held close)
- iPad: 264 PPI (held at mid distance)
- MacBook: 220+ PPI (at arm’s length)