A 4K screen has a resolution of 3840 x 2160 pixels, which is also sometimes called Ultra High Definition (UHD). This is four times as many pixels as Full HD, which has a resolution of 1920 x 1080 ...
Notable resolutions include Full HD, 4K, and 8K ... Also known as ultra-high definition, or UHD resolution, 4K is made up of 3840 x 2160 pixels for a total of just over 8 million pixels.