How far to sit from a 65 inch TV?
2.0–2.7 m 6 ft 6 in to 8 ft 10 in
Sit 2.0 m (6 ft 6 in) to 2.7 m (8 ft 10 in) from a 65-inch TV, between the THX figure (40° of your view) and the SMPTE one (30°). THX's own range runs out to 2.9 m (9 ft 6 in), and in one lab study people chose about 3.1 m (10 ft 4 in).
A 65-inch screen is 144 × 81 cm across and down, so it suits a room where your eyes can be about 2.7 m (8 ft 10 in) from the wall it hangs on. In a smaller room it still works: you sit nearer the close end of the range, which is where THX would put you anyway.
Distance is measured from your eyes to the screen, not from the front of the sofa. A deep sofa pushed against the back wall puts your eyes well forward of that wall.
Worked out for A 65-inch screen in the usual wide shape, 144 × 81 cm (57 × 32 in). Change the numbers
The working
- A 65-inch 16:9 screen is 144 cm wide and 81 cm tall.
- Seat distance: the screen fills 40° (THX) at 198 cm and 30° (SMPTE) at 269 cm.
In one lab study, people chose to sit about 314 cm from a screen this size: further back than the industry figures.
The rules, and their sources
THX 40°
THX's best seat fills 40° of your view, about 1.2 times the diagonal away. THX's own range runs from 40° (closest) to about 28° (farthest).
An industry guideline Source: Wikipedia, Optimum HDTV viewing distance (checked 31 October 2026).
SMPTE 30°
The screen fills 30° of your view when you sit about 1.6 times its diagonal away. It is widely quoted as the SMPTE figure.
An industry guideline Sources: Wikipedia, Optimum HDTV viewing distance (checked 31 October 2026); Audioholics, How to find the right size TV (checked 15 October 2026).
Other screen sizes
The closest seat fills 40° of your view (THX) and the farthest 30° (SMPTE). Both grow in step with the screen.
| Screen | Closest | Farthest |
|---|---|---|
| 43-inch | 1.3 m (4 ft 3 in) | 1.8 m (5 ft 10 in) |
| 50-inch | 1.5 m (5 ft) | 2.1 m (6 ft 9 in) |
| 55-inch | 1.7 m (5 ft 6 in) | 2.3 m (7 ft 5 in) |
| 65-inch this page | 2.0 m (6 ft 6 in) | 2.7 m (8 ft 10 in) |
| 75-inch | 2.3 m (7 ft 6 in) | 3.1 m (10 ft 2 in) |
| 85-inch | 2.6 m (8 ft 6 in) | 3.5 m (11 ft 6 in) |
Change the numbers
Your sizes will differ. The TV height and distance calculator opens with these numbers filled in: change any of them and the answer, the working and the drawing follow.
Editorial notes
Worked out by the Snuug team on 12 November 2026 with the same code as the TV height and distance calculator, so the two cannot disagree. Every rule cites its source, with the date we last checked it. A rule designers use is a convention, not a study.
Other sources the calculator draws on:
- Acoustic Frontiers, Home theater viewing angles, distances and sightlines (CEDIA, 15°), checked 31 October 2026
- Journal of the ITE of Japan 65 (2011), preferred viewing distance of HD LCD TVs, checked 24 October 2026