4k is 4096p, I would expect 8k to be 8192p, but it's only 7680p.

markild · on March 24, 2017

Long story short, it depends..[0]

In most cases, I'd guess that most people mean 3840×2160.

[0]: https://en.wikipedia.org/wiki/4K_resolution

ianburrell · on March 24, 2017

4K is 2160p. Digital theater 4K is 4096x2160 but UHDTV 4K is 3840x2160.

8K is 4320p. UHD 8K is 7680×4320.

simonh · on March 24, 2017

4k refers to approximately four thousand horizontal pixels. 1080p refers to 1080 vertical pixels. So how many 'k' and how many 'p' a display is/has aren't comparable figures.

qntty · on March 24, 2017

Thanks, this was my confusion.

theandrewbailey · on March 24, 2017

The 'p' stands for progressive scan, not the dimension being measured (neither does 'k').

simonh · on March 24, 2017

I know that and 'k' just means thousands, but in context they still indicate which dimension is being referred to. 'p' is never used to refer to horizontal dimension metrics and I've never seen 'k' on it's own with a number used to indicate vertical resolution. Not without that being explicitly stated anyway.

bitL · on March 24, 2017

DCI 4k is 4096x2160, UHD 4k is 3840x2160. If you buy EIZO/LG for video/photo editing, you get DCI, the rest is UHD.

Renaud · on March 24, 2017

4K UHD is 3840 × 2160. 8K UHD is 7680 × 4320.