4K, Ultra HD, ko 2160p ƙudurin nuni ne na pixels 3840 x 2160 ko kuma megapixels 8.3 gaba ɗaya. Ganin cewa akwai ƙarin abun ciki na 4K kuma farashin nunin 4K yana raguwa, ƙudurin 4K yana kan hanyarsa ta maye gurbin 1080p a matsayin sabon ma'auni.

Idan za ka iya biyan kuɗin kayan aikin da ake buƙata don gudanar da 4K cikin sauƙi, to lallai ya cancanci hakan.

Ba kamar gajerun kalmomin ƙudurin allo na ƙasa waɗanda ke ɗauke da pixels na tsaye a cikin lakabin su ba, kamar 1080p don 1920 × 1080 Cikakken HD ko 1440p don 2560 × 1440 Quad HD, ƙudurin 4K yana nufin kusan pixels na kwance 4,000 maimakon ƙimar tsaye.

Ganin cewa 4K ko Ultra HD yana da pixels 2160 a tsaye, wani lokacin ana kiransa 2160p.

Ana kuma kiran ma'aunin 4K UHD da ake amfani da shi don talabijin, na'urori masu saka idanu, da wasannin bidiyo da ƙudurin UHD-1 ko UHDTV, yayin da a cikin shirye-shiryen fim da bidiyo na ƙwararru, ƙudurin 4K ana yiwa lakabi da DCI-4K (Digital Cinema Initiatives) tare da jimillar pixels 4096 x 2160 ko megapixels 8.8.

Tsarin Digital Cinema Initiatives-4K yana da rabon 256:135 (1.9:1), yayin da 4K UHD ke da rabon 16:9 da aka fi sani.