What does the letter K means in display resolution?

4k is 4 times FHD (making sense),
but 2k resolution is only 1.7 times FHD.

5k resolution is 6.6 times FHD.
8K resolution is 16 times FHD.
What does K means?
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  1. Best answer
    1000 so 4 K is because there is around 4 K pixels per column
  2. pierrerock said:
    1000 so 4 K is because there is around 4 K pixels per column

    More specifically, we say "4K" because there are approximately 4000 vertical lines (3840x2160).

    Also, 4K is NOT because it is 4X 1920x1080 (2x1920 for vertical). That is just a coincidence.
  3. OK Thank you.
  4. This can be confusing as there are a few 4K resolutions. It is just a generic term thought roughly translates into the display having 4000 horizontal lines. The most common one and the first one That I saw a review for was the more known 3840x2160. I would not know what to call it but 4K would not be my first choice, but it is better than Double WQHD or something. But I think it is also known as UHD.

    Also it is a Fixed 16:9 ratio like 1280x720, 1366x768, 1600x900, 1920x1080(full HD) 2560x1440(WQHD)
    3840x2160, And that is no coincidence that the number of horizontal lines is double that of 1920x1080
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