Screen Sizes Chart
A reference chart showing the physical width and height of common TV and monitor screen sizes, based on a standard 16:9 aspect ratio and measured diagonally.
How Screen Sizes Are Measured
TV and monitor sizes are always advertised by their diagonal measurement, from one corner of the screen to the opposite corner, not by width or height alone. This chart converts that diagonal size into actual width and height dimensions in centimeters, assuming the common 16:9 widescreen aspect ratio used by most modern TVs and monitors.
Why This Matters
Knowing the actual width and height of a screen helps when planning furniture placement, wall mounting, or checking whether a TV or monitor will fit in a specific space, since the diagonal number alone doesn’t tell you how much physical room the screen will take up.
| Diagonal | 16:9 Width x Height (cm) |
|---|
Frequently Asked Questions
How wide is a 55-inch TV?
A 55-inch TV with a standard 16:9 aspect ratio is approximately 121.8 cm wide and 68.5 cm tall.
Why is screen size always measured diagonally?
Diagonal measurement gives a single consistent number regardless of aspect ratio, making it easier to compare screens of different shapes at a glance, even though it doesn’t directly tell you the width or height.
Do all TVs use a 16:9 aspect ratio?
Most modern TVs and monitors use 16:9, but some ultrawide monitors and older TVs use different ratios like 21:9 or 4:3, which would change the actual width and height for the same diagonal size.