PPI Calculator
Screen pixel density.
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TV Size Calculator
Get a TV’s width and height from its diagonal and aspect ratio.
Dimensions
—
Width × height.
| Width | — |
|---|---|
| Height | — |
| Area | — |
| Diagonal | — |
Show our math
Enter your figures above to see the step-by-step working.
Everything computed client-sideEverything computed client-side — nothing leaves this page
How the TV Size Calculator Works
A TV’s advertised size is the diagonal of the screen, not its width. To get the actual width and height, split the diagonal using the aspect ratio: for 16:9, the width is about 87% of the diagonal and the height about 49%. A 55-inch 16:9 TV is roughly 47.9 inches wide and 27 inches tall — before the bezel.
This matters for fitting a TV into a stand, cabinet or wall space. Always add an inch or two for the frame.
width and height split the diagonal by the aspect ratio
Frequently Asked Questions
How wide is a 55 inch TV?
About 47.9 inches wide and 27 inches tall for a 16:9 screen, not counting the bezel.
Why is TV size measured diagonally?
It’s a single number that captures overall size regardless of aspect ratio — a convention from the earliest TVs.
How do I know if a TV fits my stand?
Use the calculated width plus an inch or two for the frame, and check against your furniture.
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