4K Ultra HD refers to a horizontal screen display or image resolution in the order of 4,000 pixels. The most common 4K UHD resolution is 3,840 x 2,160 pixels. A 4K Ultra HD image has 8.3
million pixels (8.3 megapixels). Specifications of 4K UHD varies in professional fields and thus results in different definitions of horizontal pixels x vertical pixels.