4K, Ultra HD, ko 2160p ƙudurin nuni ne na 3840 x 2160 pixels ko 8.3 megapixels gabaɗaya.Tare da ƙarin abun ciki na 4K yana samuwa kuma farashin nunin 4K yana raguwa, ƙudurin 4K yana sannu a hankali amma a hankali yana kan hanyarsa ta maye gurbin 1080p a matsayin sabon ma'auni.

Idan za ku iya samun kayan aikin da ake buƙata don gudanar da 4K a hankali, tabbas yana da daraja.

Ba kamar ƙananan ƙananan ƙudurin allo waɗanda ke ɗauke da pixels a tsaye a cikin lakabin su, kamar 1080p don 1920 × 1080 Full HD ko 1440p don 2560 × 1440 Quad HD, ƙudurin 4K yana nuna kusan pixels 4,000 a kwance maimakon ƙimar tsaye.

Kamar yadda 4K ko Ultra HD ke da pixels na tsaye 2160, kuma wani lokacin ana kiransa 2160p.

Ma'auni na 4K UHD wanda ake amfani da shi don TVs, masu saka idanu, da wasannin bidiyo ana kuma lakafta shi azaman ƙudurin UHD-1 ko UHDTV, yayin da a cikin ƙwararrun fina-finai da samar da bidiyo, ƙudurin 4K yana da alamar DCI-4K (Initiatives Digital Cinema Initiatives) tare da 4096 x 2160 pixels ko 8.8 megapixels gabaɗaya.

Ƙaddamar Cinema na Dijital-4K ƙuduri yana da fasalin 256:135 (1.9:1) rabo, yayin da 4K UHD yana da mafi girman rabo na 16:9.