THX & SMPTE Standards · Free
TV Size Calculator
Enter your viewing distance and get the ideal TV size for your room. Based on THX and SMPTE industry standards for 4K and 1080p.
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Find your ideal TV size
Measure the distance from your seating position to the wall where the TV will go, then enter it below. The calculator returns the ideal size range plus product recommendations.
TV Size Calculator
Typical living room: 7–12 ft (2.1–3.7m)
Recommended TV Size
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Quick Reference
TV size by viewing distance
Pre-calculated recommendations for common viewing distances. Use the calculator above for your exact distance and preferred mode.
| Viewing Distance | 4K Recommended | 1080p Recommended | Typical Room |
|---|---|---|---|
| 5 ft / 1.5m | 40–43″ | 43–50″ | Studio / small bedroom |
| 6 ft / 1.8m | 43–50″ | 50–55″ | Bedroom |
| 7 ft / 2.1m | 48–55″ | 55–60″ | Small living room |
| 8 ft / 2.4m | 55–60″ | 60–65″ | Standard living room |
| 10 ft / 3m | 65–75″ | 70–80″ | Large living room |
| 12 ft / 3.7m | 75–85″ | 80–85″ | Family room |
| 15+ ft / 4.5m+ | 85″+ or projector | 85″+ | Home theater |
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When in doubt, go bigger. The number one TV regret is buying too small. Modern TVs are more affordable than ever — going one size up rarely costs much more but makes a significant difference to your experience.
Common Questions
Frequently asked questions
At 10 feet (3m), the ideal TV size is 65-75 inches for 4K, based on THX’s recommended 30-40 degree field of view. At this distance a 65-inch 4K TV fills approximately 32 degrees of your vision — right in the comfortable immersive range. For 1080p, 70-80 inches delivers comparable visual quality.
At 8 feet (2.4m), the ideal size is 55-65 inches for 4K. A 55-inch 4K TV at 8 feet fills approximately 34 degrees of your field of view — excellent for both movies and everyday viewing. For 1080p at 8 feet, consider 65-70 inches for the same visual quality.
Measure from the back of your couch cushion (where you actually sit) to the wall where the TV will go. Not from the wall to the wall — from where your eyes are when seated. If you use a recliner, measure from your head position when reclined. This is your true viewing distance.
Yes. 4K’s higher pixel density (approximately 163 PPI) lets you sit 30-40% closer without seeing pixels, which means you can get a smaller 4K TV and still have the same visual quality as a larger 1080p TV. At 8 feet, a 55-inch 4K TV looks as sharp as a 65-inch 1080p TV.
Not for most living rooms. A 65-inch TV is ideal if your couch is 8-10 feet from the screen. It is rapidly becoming the new standard size as prices have dropped. The more common concern is people buying too small — at 9-10 feet a 65-inch TV is well within the comfortable 30-40 degree viewing angle range.
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