Pixel Density Calculator
Calculate pixel density (PPI) for any display from its horizontal and vertical pixel counts and diagonal size.
Pixel density
91.8 PPI
Diagonal pixels: 2,203
Popular monitors — PPI comparison
| Display | Resolution | PPI |
|---|---|---|
| 24 in Full HD monitor | 1920 x 1080 | 92 |
| 27 in QHD monitor | 2560 x 1440 | 109 |
| 27 in 4K UHD monitor | 3840 x 2160 | 163 |
| 32 in 4K UHD monitor | 3840 x 2160 | 138 |
| 34 in Ultrawide QHD monitor | 3440 x 1440 | 110 |
| 15.6 in Full HD laptop | 1920 x 1080 | 141 |
| 13.3 in QHD laptop | 2560 x 1440 | 221 |
Source note: PPI values are calculated here from each display's stated resolution and diagonal size using PPI = diagonal pixels / diagonal inches. Diagonal sizes are nominal manufacturer sizes.
How to use this calculator
1. Enter pixel resolution and diagonal size in inches. 2. Read the PPI. 3. Compare displays at the same viewing distance, not across very different sizes.
Formula
Diagonal pixels = sqrt(Width^2 + Height^2). PPI = Diagonal pixels / Diagonal inches.
Frequently asked questions
Is pixel density the same as PPI?
Yes. Pixel density on a display is normally expressed as pixels per inch (PPI).