Question: what is the difference between 4k ultra hd and 3840 x 2160?
Answer: The resolution of UHD is 3840 x 2160 pixels (8,294,400 pixels overall), which is four times higher than that of its predecessor. ... 4K refers to a horizontal resolution of 4096 Pixels (4K = 4000). The number of vertically-arranged pixels is 2160 (2K) for television sets. Therefore, we sometimes use the term 4K2K.