8K Ultra HD refers to a horizontal screen display or image resolution of approx. 8,000 pixels. The most common 8K UHD resolution is 7,680 x 4,320 pixels. An 8K Ultra HD image has 33.2 million pixels (33.2 megapixels). Specifications of 8K UHD varies in professional fields and thus results in different definitions of horizontal pixels x vertical pixels.