10 feet away
A 83-inch TV is the sweet spot at 10 feet. Anything from 74 to 89 inches sits in the SMPTE-to-THX range for mixed use; go larger for a dedicated movie room.
Best size at 10 feet
83"
34° viewing angle. Sizes that fit: 70, 75, 77, 83, 85, 86 inches.
Dedicated movie room (36–40°)
89–100"
common sizes: 85, 86, 97, 98, 100
Mixed movies and TV (30–36°)
74–89"
common sizes: 70, 75, 77, 83, 85, 86
Casual viewing (24–30°)
59–74"
common sizes: 55, 58, 65, 70, 75, 77
| Size | Viewing angle | Verdict |
|---|---|---|
| 43" | 18° | Too small for movies |
| 48" | 20° | Too small for movies |
| 50" | 21° | Too small for movies |
| 55" | 23° | Too small for movies |
| 58" | 24° | Too small for movies |
| 65" | 27° | Comfortable everyday |
| 70" | 29° | Comfortable everyday |
| 75" | 30° | Immersive (SMPTE) |
| 77" | 31° | Immersive (SMPTE) |
| 83" | 34° | Immersive (SMPTE) |
| 85" | 34° | Immersive (SMPTE) |
| 86" | 35° | Immersive (SMPTE) |
| 97" | 39° | Cinematic (THX) |
| 98" | 39° | Cinematic (THX) |
| 100" | 40° | Cinematic (THX) |
How we got these numbers
At 10 feet (120 inches) from your eyes to the screen, TV size is a question of viewing angle. SMPTE's cinema guidance calls for the screen to fill at least 30° of your horizontal view; THX recommends 36°, and 40° is the widely used cap for the best seat. Casual TV viewing is comfortable at 24° to 30°.
Each angle converts to a screen width (2 × distance × tan(angle ÷ 2)) and then to a 16:9 diagonal. At 10 feet that gives roughly 59 inches at 24°, 74 inches at 30°, 89 inches at 36°, and 100 inches at 40°.
Sizes are rounded to what stores actually sell. If you are between two sizes and the wall allows it, the larger one is almost always the better long-term choice; the most common regret is buying too small.
Common questions
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