What size TV for 4 metres away?
From 4 m, a picture filling a cinema-like 40° of your view has a 132 inch diagonal. That is past any sensibly priced TV: this seat is projector territory.
The math of the seat
THX recommends a picture filling about 40 degrees of your horizontal view for the best seat. From 4 m (13.1 ft), inverting that angle gives a 16:9 diagonal of 132 inches; the shorthand is distance divided by 1.2.
No mainstream TV reaches the cinematic angle from this seat: even a 115-inch set fills only 35° from 4 m. A projector throwing a 132-inch picture fills the 40° exactly, and a projected image is continuously sizable, so that number is settable rather than shoppable.
From this seat, the conventional 60 central pixels-per-degree reference corresponds to about 101 inches at 1080p, 202 inches at 4K, and 404 inches at 8K. Smaller screens have higher PPD at the same resolution and distance. These are sampling references, not hard limits on visible detail.
Choose how you watch from 4 m
These are adjustable starting points, not genre standards or hard comfort limits. Home cinema uses 40°; Ultimate cinema starts at a more enveloping 55°. Gaming assumes a couch setup. Choose a mood to fine-tune the recommendation from this same seat.
| Viewing mood | Target angle | Nearest listed size |
|---|---|---|
| News | 25° | 83 in TV |
| TV shows | 30° | 98 in TV |
| Gaming | 35° | 115 in TV |
| Home cinema | 40° | 132 in projected picture |
| Ultimate cinema | 55° | 188 in projected picture |
Every common size from 4 m
| Size | Picture (w × h) | Fills | 4K sharpness |
|---|---|---|---|
| 43 in | 37.5 in (95.2 cm) × 21.1 in (53.5 cm) | 14° | 282 PPD |
| 50 in | 43.6 in (110.7 cm) × 24.5 in (62.3 cm) | 16° | 242 PPD |
| 55 in | 47.9 in (121.8 cm) × 27.0 in (68.5 cm) | 17° | 220 PPD |
| 65 in | 56.7 in (143.9 cm) × 31.9 in (80.9 cm) | 20° | 186 PPD |
| 75 in | 65.4 in (166.0 cm) × 36.8 in (93.4 cm) | 23° | 161 PPD |
| 77 in | 67.1 in (170.5 cm) × 37.8 in (95.9 cm) | 24° | 157 PPD |
| 83 in | 72.3 in (183.7 cm) × 40.7 in (103.4 cm) | 26° | 146 PPD |
| 85 in | 74.1 in (188.2 cm) × 41.7 in (105.8 cm) | 26° | 142 PPD |
| 98 in | 85.4 in (217.0 cm) × 48.0 in (122.0 cm) | 30° | 124 PPD |
| 100 in | 87.2 in (221.4 cm) × 49.0 in (124.5 cm) | 31° | 121 PPD |
| 110 in | 95.9 in (243.5 cm) × 53.9 in (137.0 cm) | 34° | 110 PPD |
| 115 in | 100.2 in (254.6 cm) × 56.4 in (143.2 cm) | 35° | 105 PPD |
Sitting somewhere between the listed distances, or want to measure the seat first? The interactive version, prefilled for this seat takes any distance, and on an iPhone it measures the room in AR. Mounting the pick on a wall? The mounting height calculator finishes the job.
Tune this seat: choose your viewing moodChoose a display for your installer planFree planning · €9 once for the mounting plan PDF
Reading this on an iPhone? Open it in the calculator and tap "Compare on your wall" to see the screens in your room at true physical size, in augmented reality.
Common questions
What size TV should I get for sitting 4 metres away?
For a cinematic picture filling 40 degrees of view, about 132 inches, which is past any mainstream TV: from 4 m a projector throwing a 132-inch picture is the honest answer.
Is 4K worth it from 4 metres?
From 4 m, a 4K panel stays above the 60 central pixels-per-degree reference up to about 202 inches, while 1080p crosses it at about 101 inches. On screens between those sizes, 4K stays at or above the reference where 1080p falls below it; whether you notice that difference also depends on eyesight, content and the TV's processing.
Is a 115 inch TV big enough for 4 metres?
Not for a cinematic picture. From 4 m, the biggest common TV, 115 inches, fills about 35 degrees of your view, short of the 40 degrees THX recommends. It still works well for sport, shows and casual viewing. For the full 40 degrees, a projector throwing a 132-inch picture fills it exactly.
Related pages
How these measurements are calculated
For a diagonal d and aspect ratio w:h, screen width is d × w / √(w² + h²), and height is d × h / √(w² + h²). Area is width × height; PPI is √(horizontal pixels² + vertical pixels²) / diagonal in inches. Results are rounded for display.
Screen dimensions exclude the frame, feet and stand. Check the manufacturer's measurements for furniture and mounting clearance. A flat-screen viewing angle is 2 × atan(width / (2 × eye-to-screen distance)). The 40° cinema target is a preference, not a requirement; adjust the viewing angle for your room. It is approximately equivalent, for a 16:9 screen, to the distance × 0.835 sizing rule in the THX viewing guide.
The 60 central pixels-per-degree reference is a rule of thumb, not a guarantee that two displays look identical. Eyesight, contrast, source quality and panel technology also matter. Check sharpness at your own viewing distance.
Every number on this page is computed from resolution and diagonal with the DisplayMath screen size calculator. Free, no signup, runs in your browser. Content updated . Feedback? Email hello@displaymath.com or find us on Instagram. About · Privacy. © 2026 DisplayMath. All rights reserved.