4K UHD is a resolution of 3840 pixels × 2160 lines.

4K UHD is a resolution of 3840 pixels × 2160 lines (8.3 megapixels, aspect ratio 16:9) and is one of the two resolutions of ultra high definition television targeted towards consumer television, the other being 8K UHD which is 7680 pixels × 4320 lines (33.2 megapixels).

UHD has twice the horizontal and vertical resolution of the 1080p HDTV format, with four times as many pixels overall.

Televisions capable of displaying 4K resolutions are seen by consumer electronics companies as the next trigger for an upgrade cycle due to a lack of consumer interest in 3D television.

Besides resolution, the UHD standard and related technologies (e.g. HDMI 2.0) include other higher specifications.