A:Answer Hi Jim. The LG UHD 73 Series 65 inch Class 4K Smart UHD TV with AI ThinQ® (64.5'' Diag), Model # 65UN7300PUF has a native resolution of 3840 x 2160. That means it has 3840 pixels horizontally by 2160 pixels vertically.To find the total number of pixels, just multiply the two numbers for a total of 8,294,400 which is 4 times the number of pixels for Full HD (i.e. 1920 x 1080 + 2,073,600) hence the 4K. 4K refers to one of two high definition resolutions: 3840 x 2160 pixels or 4096 x 2160 pixels. 4096 x 2160 option is where many films are shot or mastered in 4K by upscaling from 2K (1998 x 1080 for the 1.85:1 aspect ratio or 2048 x 858 for 2.35:1 aspect ratio). TV's have an Aspect Ratio of 16:9, 3840 x 2160 is a 16:9 Aspect Ratio (4096 x 2160 is an Aspect Ratio of 1.896:1)...^IFV