55 Inch TV Dimensions

The panel numbers, in one line

A 55-inch 16:9 panel is 47.94 by 26.96 inches — 121.8 by 68.5 cm — and covers 1,292.6 square inches, which is 8,339.2 square centimetres.

That is the lit rectangle and nothing else: the frame, the stand and the chassis behind the glass are all outside it. The same working for the size above is on the 65-inch page, and for the size two steps up on the 70-inch page.

Height with the stand is the number that goes missing

Almost every page that answers this query stops at the glass. The glass is 26.96 inches tall, but no 55-inch TV is 26.96 inches tall on a shelf: the frame adds a little, and the stand adds a lot. Listings mix the two readings freely, and most do not say which one you are being handed.

Seven published sheets that give both heights. These are quoted as published and not recalculated. The year is the model year; the make is left out on purpose, because the height does not depend on who built it — the stand does. Every row is a 55-inch set, and every row publishes both heights.

The lift runs from 0.87 inches on the flattest stand to 2.68 inches on the tallest. The tallest stand lifts more than three times as much as the flattest, which is why there is no single figure to plan a shelf with.

One more reading covers the size rather than a set: an aggregate over 1,446 models, which publishes 71.2 cm (28.0 in) without the stand and 77.1 cm (30.4 in) with it. It is not in the table, because its own two readings do not subtract cleanly — 77.1 minus 71.2 is 5.9 cm, which is 2.32 inches, while 30.4 minus 28.0 is 2.40. That 0.08-inch gap is rounding, not a different measurement: each height is rounded to a tenth of an inch on its own, and a difference of two rounded numbers is not the same as a rounded difference. Read as a band it says what the seven rows say — a bit over two inches, between the shortest stand and the tallest.

The tallest with-stand figure in the same set of sheets is 30.87 inches (78.4 cm), on a set whose without-stand height is not published. That is the number to leave room for if you are buying before you have chosen a model.

The frame is already in there too

Read the middle column of that table against the glass and a second gap appears. The glass is 26.96 inches tall; the sets without their stands run 27.68 to 28.58 inches — 0.72 to 1.62 inches taller than the picture. That is the frame and the chassis above and below it, and it is already present before any stand is fitted.

So a height quoted for a 55-inch TV has three possible meanings, and they are stacked: 26.96 for the glass, 27.68 to 28.58 for the set without its stand, 29.06 to 30.87 with the stand on. A listing that gives one number and no note has given you one of three, and the spread between the smallest and the largest is nearly four inches.

So when a height does not say with the stand, do not trust it. Ask for the reading with the stand, or take the model number and read its own sheet — nothing on this page can tell you which of the three a bare number is.

Checking a shelf against the published heights

Type the clearance you have — the gap between the shelf and whatever is above it — into the field at the top, and the line under the results counts how many of the seven sets in the table fit under it, with the stand on and with it off. It counts, and it does not interpolate: no set sits at a height that is not in the table, so there is nothing between two rows to guess at.

The count moves faster than the numbers suggest. At 30.55 inches all seven fit standing up, because that is the tallest stand in the table. At 30 only five of the seven do. At 29.5 only two do, and at 28.58 none does, though every one of them still fits with the stand off.

Below 27.68 inches nothing fits even without its stand, and below 26.96 not even the glass does.

Depth is a separate question and a separate page: it is not a panel number either, and the published readings for a finished 55-inch set are not on this page. The 70-inch page sets out how that column is built, and the same reasoning applies here.

How the panel numbers are calculated

Width, height and area come from the diagonal and the ratio, so nothing is looked up:

The ratio a:b is the width over the height, so 16:9 means 16 units across for every 9 down. For 55 inches at 16:9 the divisor is √((16 ÷ 9)² + 1) = 2.039729, and 55 ÷ 2.039729 = 26.9644. Width is 1.777778 × 26.9644 = 47.9367.

There is no third equation for the height with the stand, and none for the frame. Neither is in the geometry, and neither is in the resolution: 3840 × 2160 changes the pixel density and nothing else.

What is rounded

Width and height are shown to 2 decimals in inches and 1 decimal in centimetres, and the area to 1 decimal in both units. The arithmetic runs at full precision and only the display is rounded — 47.9367 reads as 47.94, 26.9644 as 26.96, 121.7592 as 121.8, and 1,292.58 as 1,292.6.

The published heights in the table keep the decimals they were published with, which is why one row reads 29.06 and another 30.55. Nothing there has been rounded to a common precision, because rounding them together would hide the very spread the table exists to show.

Pixel density is shown to 2 decimals and pixel pitch to 4, because a pitch of 0.32 mm and one of 0.3171 mm are different pixels on a 4K screen of this size.

What is measured

Width, height and area are the active panel: the lit rectangle you watch. Bezels, the frame and the stand are excluded from those three figures. Every height in the table above is a published figure for a finished set, measured by whoever published it, and each row says whether the stand was on.

Questions this page answers