Galaxy S21
Phones · FHD+ · 2021
Resolution
1080×2400
Diagonal
6.2"
Pixel density
424ppi
| Resolution | 1080 × 2400 |
|---|---|
| Resolution class | FHD+ |
| Diagonal | 6.2" |
| Pixel density | 424 ppi |
| Aspect ratio | 20:9 (9:20) |
| Total pixels | 2,592,000 · 2.6 MP |
| Physical size | 64.6 × 143.6 mm |
| Screen area | 14.4 in² |
| Pixel pitch | 59.8 µm |
| Pixels vanish at | 20.6 cm |
| Orientation | Portrait |
| Released | 2021 |
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 Galaxy S21 screen resolution?
1080×2400 pixels — 2,592,000 in total, about 2.6 megapixels, which puts it in the FHD+ class.
Q. What is the pixel density of the Galaxy S21?
424 ppi. That is the diagonal in pixels of a 1080×2400 grid divided by the 6.2" diagonal of the panel, and it makes each pixel about 59.8 micrometres across.
Q. How big is the Galaxy S21 screen in millimetres?
64.6 mm wide and 143.6 mm tall, worked out from the 6.2" diagonal and the 9:20 aspect ratio. The visible area is roughly 14.4 square inches.
Q. How far away do pixels stop being visible on the Galaxy S21?
About 20.6 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 Galaxy S21 use?
20:9 (exactly 9:20), with the long edge 2.22× the short one. It is taller than it is wide, which suits a device you hold in one hand.
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 |
|---|---|---|---|
| Galaxy S24 | 1080×2340 | 6.2" | 416 ppi |
| Pixel 8 | 1080×2400 | 6.2" | 424 ppi |
| iPhone 16 Pro | 1206×2622 | 6.3" | 458 ppi |
| Pixel 9 Pro | 1280×2856 | 6.3" | 497 ppi |
| Pixel 7 | 1080×2400 | 6.3" | 418 ppi |
| iPhone 16 | 1179×2556 | 6.1" | 461 ppi |
| iPhone 15 Pro | 1179×2556 | 6.1" | 461 ppi |
| iPhone 15 | 1179×2556 | 6.1" | 461 ppi |