The exact dimensions of a 55-inch television are dependent on a number of factors, but a conventional wide format screen measures 26.96 inches in height and 47.94 inches in width. A conventional format screen with a diagonal measurement of 55 inches is 33 inches tall and 44 inches wide.
The height and width of displays with the typical 4:3 aspect ratio can be calculated by multiplying the diagonal dimensions by 0.6 for the height and 0.8 for the width for any size screen. The height and breadth of a widescreen with a 16:9 aspect ratio can be calculated by multiplying the diagonal measurement by 0.49 for height and 0.87 for width. The overall dimensions of the television are determined by a number of factors, including the size of the case and the bezel that surrounds the screen.