4K or UHD
You may notice that the terms “4K” and “UltraHD” (or UHD) are used interchangeably. Well, that’s not entirely accurate as Ultra HD is about double the pixels of HD both in height and width, and runs at a 16:9 ratio for television screens. This translates to a display resolution of 3,840 x 2,160, compared to the 4,096 x 2,160 resolution that 4K cinema screens run at. While it’s obvious that 3840 does not quite equate to 4000, many television manufacturers have adopted the “4K” moniker over UHD, so it appears the confusion is here to stay.