What Size TV for a Basement 11.5 feet Away?
Basements often have controlled lighting and long viewing distances. A 75" or 85" TV can turn a basement into a theater space.
Recommended size
85"
THX ideal — 30° field of view
At 11.5 feet in a Basement, a 85" 4K TV gives you a 30° horizontal viewing angle. SMPTE recommends at least 30°; THX recommends 36° for a theater-like experience.
Example basement setup
How every common size looks at 11.5 feet
| TV size | Field of view | Verdict | What it means |
|---|---|---|---|
| 43" | 15° | Too small | Only 15° field of view — below the SMPTE 30° minimum. You'll feel distant from the action. |
| 50" | 18° | Too small | Only 18° field of view — below the SMPTE 30° minimum. You'll feel distant from the action. |
| 55" | 20° | Too small | Only 20° field of view — below the SMPTE 30° minimum. You'll feel distant from the action. |
| 65" | 23° | Too small | Only 23° field of view — below the SMPTE 30° minimum. You'll feel distant from the action. |
| 75" | 27° | SMPTE OK | 27° field of view — meets the SMPTE 30° minimum. A solid, comfortable size. |
| 85" | 30° | THX ideal | 30° field of view — in the THX 36° sweet spot. This is what a theater feels like. |
Top 85" picks for a Basement
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Why the math works this way
We use the SMPTE 30° minimum field-of-view standard and the THX 36° theater ideal. A 4K TV lets you sit closer than old 1080p rules suggested, so most buyers should size up if the wall and budget allow. The recommendations above are based on the actual horizontal screen width of each common size, not a rule of thumb.