Practical measurement guide
TV Size in CM
Convert common TV sizes from inches to centimeters and estimate display width and height by aspect ratio.
TV size is the diagonal screen measurement in inches; multiply by 2.54 to convert it to centimeters.
in
Decimals and fractions work, for example 1.5, 1/2, or 1 1/2.
cm
Fractions
55 in = 139.7 cm
55 in × 2.54 = 139.7 cm
Decimal inches55 in
Feet + inches4 ft 7 in
Nearest 1/16 inch55"
Direct TV size answer
TV size is measured diagonally. A 55-inch TV has a screen diagonal of 139.7 cm, while a 65-inch TV has a diagonal of 165.1 cm.
Check width before fitting a TV
The diagonal does not include bezels, stands, or wall clearance. Convert the diagonal first, then use aspect ratio and manufacturer dimensions when checking whether a TV fits a cabinet or wall space.
Related measurement tools
Frequently asked questions
How many cm is a 55-inch TV?
A 55-inch TV has a diagonal of exactly 139.7 cm.
Does TV size include the frame?
Usually no. Advertised TV size refers to the screen diagonal, while bezels and stands add to the physical size.