TV Dimensions Calculator
Get the exact width, height, and area of any TV from its diagonal — in inches and centimeters.
How this is calculated
With aspect ratio 16:9 (r = 1.78): height = diagonal ÷ √((w/h)² + 1), then width = (w/h) × height.
For a 65″ screen: height = 65 ÷ √(1.78² + 1) =
65 ÷ 2.04 = 31.9″; width = 1.78 × 31.9 = 56.7″.
How TV dimensions work
A TV's advertised size is the diagonal of the screen, measured corner to corner — not its width and not including the bezel. For a standard 16:9 TV, the screen's width is about 0.87× the diagonal and its height about 0.49×. So a 65″ TV is roughly 56.7″ wide and 31.9″ tall. Add the bezel and stand for the real footprint. Enter any measurement above to convert instantly.
16:9 TV size chart (22″–100″)
Active-screen dimensions for the standard 16:9 aspect ratio. Add a bezel for the outer size.
| Size | Width | Height | Area |
|---|---|---|---|
| 24" | 20.9″ | 11.8″ | 246 in² |
| 32" | 27.9″ | 15.7″ | 438 in² |
| 40" | 34.9″ | 19.6″ | 684 in² |
| 43" | 37.5″ | 21.1″ | 790 in² |
| 50" | 43.6″ | 24.5″ | 1,068 in² |
| 55" | 47.9″ | 27″ | 1,293 in² |
| 60" | 52.3″ | 29.4″ | 1,538 in² |
| 65" | 56.7″ | 31.9″ | 1,805 in² |
| 70" | 61″ | 34.3″ | 2,094 in² |
| 75" | 65.4″ | 36.8″ | 2,404 in² |
| 80" | 69.7″ | 39.2″ | 2,735 in² |
| 85" | 74.1″ | 41.7″ | 3,087 in² |
| 90" | 78.4″ | 44.1″ | 3,461 in² |
| 98" | 85.4″ | 48″ | 4,104 in² |
| 100" | 87.2″ | 49″ | 4,273 in² |
How to calculate TV width and height
Use the screen's aspect ratio and a little geometry: height = diagonal ÷ √((width-ratio ÷ height-ratio)² + 1), then width = (ratio) × height. Worked example for a 65″ 16:9 TV: height = 65 ÷ √((16/9)² + 1) = 65 ÷ 2.04 = 31.9″; width = (16/9) × 31.9 = 56.7″. The calculator handles any aspect ratio, including 21:9 and 4:3.
Other aspect ratios (21:9, 32:9, 4:3)
Ultrawide and classic TVs have different proportions. A 21:9 "cinema" screen is wider and shorter than 16:9 for the same diagonal; a 4:3 classic is taller and narrower. Pick your ratio above and the dimensions update.
Screen size vs. real footprint (bezel & stand)
The numbers above are the active screen. Real TVs add a thin bezel (often under an inch per side) and a stand or feet. For fitting a TV on furniture or a wall niche, use the with-bezel width from our size pages and check the stand's foot span — it's often wider than people expect.