TV viewing distance: how far to sit from your screen
By Nassim Hasni, publisher of DecoScale · published
Sit between 1.5 and 2.5 times the screen's diagonal from the TV: 2.1 to 3.5 m for a 55-inch screen. Here is that distance for every common screen size, the screen size for every distance, and what to measure at home before buying a sofa or a television.
What is the rule for sofa-to-TV distance?
Between 1.5 and 2.5 times the screen's diagonal, measured from where you sit to the screen itself. It is the range DecoScale's engine uses when it places a sofa facing a screen, usually working from an approximate diagonal (see below).
Why a range rather than a single figure? Because use varies. At the closest, the picture takes up a large part of your view: what you want for a film or a match. At the furthest, it stays readable for the news or a television left on while people talk. Closer than the minimum, the screen floods your view; further than the maximum, subtitles and details shrink.
How far should you sit from a 43, 50, 55, 65, 75 or 85-inch TV?
The diagonal in centimetres is the size in inches multiplied by 2.54. The minimum distance is that diagonal multiplied by 1.5, the maximum distance by 2.5.
| Screen size (inches) | Diagonal (cm) | 16:9 picture width (cm) | Minimum distance (m) | Maximum distance (m) |
|---|---|---|---|---|
| 43 | 109 | 95 | 1.6 | 2.7 |
| 50 | 127 | 111 | 1.9 | 3.2 |
| 55 | 140 | 122 | 2.1 | 3.5 |
| 65 | 165 | 144 | 2.5 | 4.1 |
| 75 | 191 | 166 | 2.9 | 4.8 |
| 85 | 216 | 188 | 3.2 | 5.4 |
The width shown is that of the picture in 16:9 format, bezel not included: the least wall space the screen takes up, and a guide to the width of the unit that will hold it.
What size TV for the distance from my sofa?
The same calculation in reverse: divide the distance by 2.5 for the smallest recommended diagonal, by 1.5 for the largest, then by 2.54 to convert to inches.
| Viewing distance (m) | Minimum diagonal (inches) | Maximum diagonal (inches) |
|---|---|---|
| 1.5 | 24 | 39 |
| 2 | 31 | 52 |
| 2.5 | 39 | 66 |
| 3 | 47 | 79 |
| 3.5 | 55 | 92 |
| 4 | 63 | 105 |
| 4.5 | 71 | 118 |
Between two sizes that both fit, the larger one is not an extravagance. In a long living room, a sofa and a television each backed against their own wall can end up beyond the maximum. Pulling the sofa away from the wall to bring it closer leaves it in the middle of the room, which it cuts in two. A larger screen fixes the distance without moving any furniture.
How do you measure the viewing distance at home?
- From where your head is, not from the edge of the sofa. Sit back in the seat and measure from there to the screen. On a floor plan, DecoScale measures from the middle of the sofa to the middle of the screen, a point slightly closer to the screen than your head.
- To the screen, not to the wall. On a unit, the screen sits further into the room: measure from the screen itself.
- The diagonal, not the width. Screen sizes are given in inches of diagonal; one inch is 2.54 cm.
- Resolution matters too. On a screen of the same size, the pixels of a 4K picture are half the size of those of a Full HD picture: you can sit twice as close before you can make them out. The low end of the range therefore suits a 4K screen better.
In DecoScale, the distance is calculated on the plan of the room, measured from your photos. Before drawing, DecoScale asks you for two tape-measure dimensions — the back wall and the depth: they are what make the plan exact. The details are on the Method page.
What do film and television engineers recommend?
They think in angles: the share of your horizontal field of view that the picture fills. SMPTE, the Society of Motion Picture and Television Engineers, recommends 30°, the usual angle in a multipurpose room; THX recommends about 40° for a cinematic experience. Converted exactly for a 16:9 screen, these angles give the distances below, alongside DecoScale's two limits:
| Reference | Distance (× diagonal) | Horizontal viewing angle | Distance for a 55-inch TV (m) |
|---|---|---|---|
| THX (home cinema) | 1.2 × | 40° | 1.7 |
| DecoScale, closest | 1.5 × | 32° | 2.1 |
| SMPTE (film and television) | 1.6 × | 30° | 2.3 |
| DecoScale, furthest | 2.5 × | 20° | 3.5 |
Angles: SMPTE and THX, as cited by Kaleidescape. Distances converted by DecoScale for a 16:9 screen; the rounded rule of thumb given by the source puts 30° slightly closer.
DecoScale's range starts close to SMPTE's 30° and extends to greater distances, where the picture fills a narrower angle: a living room is also watched from afar, while you have guests over or read.
Should the sofa face the TV?
The main sofa, yes. DecoScale wants it facing the screen wall: not at an angle, not side-on, and least of all with its back to it. The screen, for its part, must be turned towards the sofa: a television on a side wall, seen side-on, also counts as a fault. Armchairs have more freedom: they can sit to the sides, at a sensible distance from the screen, as long as they do not turn their back to it.
These rules are penalties, not bans: in a small room, the engine looks for the layout that breaks the fewest. And they do not all weigh the same. For the same gap, a main sofa at an angle or with its back to the screen costs far more than a viewing distance slightly too long or too short: facing the screen comes before the exact distance.
The living room as photographed, then the same living room rendered by AI in a minimalist style: the wall-mounted television stays in place, and the new sofa faces it.
What if the TV is already mounted on the wall?
Then there is nothing to hold up. When your photos show a television already mounted on the wall or built into a recess, you are changing the whole room and you have not declared a television under Equipment, DecoScale does not include a TV unit: its share of the budget goes to the other furniture. If you are changing only part of the room and ‘TV unit, sideboard’ is among what you change, it is bought if the budget allows; the app tells you so and, in most cases, offers a button to drop it.
The television stays where it is; if you are replacing the sofa, it is the sofa that is placed to face it. DecoScale does not know the size of that screen: it only checks that the sofa is not too close, assuming the diagonal of an ordinary screen, 120 cm.
The same caution applies elsewhere. For a TV unit DecoScale chooses, it does not know which television will go on it, and takes the unit's width as an approximate diagonal. DecoScale's catalogue has no televisions, but you can add one under Equipment, with its own budget, standing on a unit or mounted on the wall: it is drawn and counted in the total, without a purchase link. You give its budget, not its size: mounted on the wall, DecoScale assumes the size of an ordinary screen; standing, the width of the unit beneath it.
And in a bedroom?
There, you watch television from the bed. When you add a television to a bedroom, it is the bed that has to face it, with the same distance range, based on the approximate size described above. For the rest of the room, see bedroom design and small bedroom layout.
The other living room distances — coffee table, rug, walkways — are on the room layout dimensions page. For a narrow living room, see small living room layout; for the rug under the sofa, the rug size guide.
Frequently asked questions
How far should you sit from a 55-inch TV?
Sit 2.1 to 3.5 m away. A 55-inch screen has a 140 cm diagonal, and the comfortable distance runs from 1.5 to 2.5 times that diagonal. Measure from where your head is when seated to the screen itself.
How far should you sit from a 65-inch TV?
Sit 2.5 to 4.1 m away. A 65-inch screen has a 165 cm diagonal, and the comfortable distance runs from 1.5 to 2.5 times that diagonal. With a 4K screen, the low end of the range stays comfortable.
How far should you sit from a 75-inch TV?
Sit 2.9 to 4.8 m away. A 75-inch screen has a 190.5 cm diagonal, and its 16:9 picture is about 166 cm wide: allow a stretch of wall, or a unit, at least that wide.
What size TV for a 3-metre viewing distance?
A diagonal of 47 to 79 inches. You get it by dividing the distance, 300 cm, by 2.5 for the smallest diagonal and by 1.5 for the largest, then converting to inches (one inch is 2.54 cm).
Do you need a TV unit if the TV is wall-mounted?
Not to hold it up. If your photos show a television already mounted on the wall and you are changing the whole room, without declaring a television, DecoScale does not include a TV unit and shares its budget out among the other furniture. If you are changing only part of the room, a low unit for storage is still possible: keep ‘TV unit, sideboard’ among what you change, and it will be bought if the budget allows.
Can you sit closer to a 4K TV?
Yes. You can move closer to a screen until you start to see its pixels. At 1.5 times the diagonal, a Full HD pixel covers about one minute of arc, roughly what the eye can make out; a 4K pixel, half the size, stays invisible. It is at the low end of the range that 4K makes the most difference.