DCI 4K on a 27" screen
Monitors · QHD+
Resolution
4096×2160
Diagonal
27"
Pixel density
172ppi
| Resolution | 4096 × 2160 |
|---|---|
| Resolution class | QHD+ |
| Diagonal | 27" |
| Pixel density | 172 ppi |
| Aspect ratio | 256:135 |
| Total pixels | 8,847,360 · 8.8 MP |
| Physical size | 606.6 × 319.9 mm |
| Screen area | 300.8 in² |
| Pixel pitch | 148.1 µm |
| Pixels vanish at | 50.9 cm |
| Orientation | Landscape |
How to read this
- Pixel density (ppi) is how many pixels fit in one inch. Resolution alone cannot tell you — you have to divide by the diagonal.
- The same 4K is 163 ppi on a 27" monitor and 68 ppi on a 65" TV. That is more than double, but a TV is watched from far away, so it does not matter.
- The distance at which pixels vanish comes from one arcminute, the limit of human sight. Once a pixel looks smaller than that, no eye can find the grid.
- Aspect ratio is width and height reduced to the simplest whole numbers. Modern phones are 19.5:9 or 20:9, so 16:9 video leaves black bars on the sides.
Frequently asked questions
Q. What is the DCI 4K on a 27" screen screen resolution?
4096×2160 pixels — 8,847,360 in total, about 8.8 megapixels, which puts it in the QHD+ class.
Q. What is the pixel density of the DCI 4K on a 27" screen?
172 ppi. That is the diagonal in pixels of a 4096×2160 grid divided by the 27" diagonal of the panel, and it makes each pixel about 148.1 micrometres across.
Q. How big is the DCI 4K on a 27" screen screen in millimetres?
606.6 mm wide and 319.9 mm tall, worked out from the 27" diagonal and the 256:135 aspect ratio. The visible area is roughly 300.8 square inches.
Q. How far away do pixels stop being visible on the DCI 4K on a 27" screen?
About 50.9 cm. That is where a pixel subtends less than one arcminute, the limit of human sight — closer than that and the grid starts to show.
Q. What aspect ratio does the DCI 4K on a 27" screen use?
256:135, with the long edge 1.9× the short one. It is wider than it is tall, which suits video and side-by-side documents.
Screens of a similar size
The same diagonal at a different resolution means a different density. 4K is 163 ppi on a 27" monitor and 68 ppi on a 65" TV.
| Device | Resolution | Diagonal | Density |
|---|---|---|---|
| 27" Full HD monitor | 1920×1080 | 27" | 82 ppi |
| 27" QHD monitor | 2560×1440 | 27" | 109 ppi |
| 27" 4K monitor | 3840×2160 | 27" | 163 ppi |
| Apple Studio Display | 5120×2880 | 27" | 218 ppi |
| 27" 5K monitor | 5120×2880 | 27" | 218 ppi |
| 24" Full HD monitor | 1920×1080 | 24" | 92 ppi |
| iMac 24" (M3) | 4480×2520 | 23.5" | 219 ppi |
| 32" QHD monitor | 2560×1440 | 32" | 92 ppi |