Free room planning tool
TV Size Calculator
What size TV do you need for your room? Enter how far you sit from the screen and this calculator gives you the ideal TV size, plus the comfortable range, for a living room, bedroom, or home theater. It uses the viewing-distance standards from SMPTE and THX, adjusted for 4K or 1080p.
What this tool solves
- • Tells you what size TV to buy for your room.
- • Sets the ideal viewing distance for any screen.
- • Adjusts for 4K or 1080p resolution.
- • Works for a bedroom, living room, or home theater.
Enter your details
Start with how far you sit from the screen, then pick your resolution.
Quick room presets
Resolution
Recommendations only. Personal preference, room brightness, and content all shift the ideal size.
Recommended TV size
75 inches
Sitting about 9 ft from the screen, aim for a 75-inch 4K TV. A 65 to 85 inch screen also works well.
- Good range: 65 to 85 inches
- Resolution: 4K TV
- Viewing distance: 9 ft
How to use it
Bigger is usually better up to the top of the range. If you are between two sizes and watching mostly movies or sport, size up; for a bright room with lots of news and daytime TV, the middle of the range is easier on the eyes.
See it on your wall
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Visualize your room with AIWhat size TV do I need for my room?
The right TV size comes down to one thing: how far you sit from the screen. Sit too far from a small TV and the picture feels distant and underwhelming; sit too close to a big one and you cannot take in the whole screen at once. The sweet spot is a screen large enough to fill a comfortable slice of your field of view. In practice, take your viewing distance in inches and multiply by roughly 0.6 to 0.8 to get the diagonal screen size. The calculator above does it for your exact distance and resolution.
How far should you sit from the TV?
These are the ideal seating ranges for common TV sizes, from the immersive end (a cinematic 40 degree view) to the comfortable end (a relaxed 30 degree view). If your distance falls in the range for a size, that size will look right in the room.
| TV size | Ideal viewing distance |
|---|---|
| 40 inches | 4.0 ft to 5.4 ft |
| 43 inches | 4.3 ft to 5.8 ft |
| 50 inches | 5.0 ft to 6.8 ft |
| 55 inches | 5.5 ft to 7.5 ft |
| 65 inches | 6.5 ft to 8.8 ft |
| 75 inches | 7.5 ft to 10.2 ft |
| 85 inches | 8.5 ft to 11.5 ft |
4K vs 1080p: how close can you sit?
Resolution changes how big you can go. A 4K screen packs four times the pixels of 1080p, so you can sit closer without the image breaking up, which means a larger TV works at the same distance. With a 1080p set, sitting too close reveals the pixel grid, so stay toward the smaller, comfortable end of the range. Switch the resolution toggle in the calculator to see how the recommendation shifts.
What size TV for a living room vs a bedroom?
Living rooms usually seat people 8 to 12 feet from the TV, which suits a 55 to 75 inch screen, with 65 inches the popular middle. Bedrooms have a shorter 5 to 8 foot distance, so a 43 to 55 inch TV fits without dominating the wall. A dedicated home theater, seated 11 feet or more back, is where 75 to 85 inch screens earn their keep. Use the room presets above to jump straight to a typical distance for each.
TV size questions
What size TV do I need for my room?
Measure how far you sit from the screen, then multiply that distance (in inches) by about 0.6 to 0.8. A 4K TV can sit at the larger end; a 1080p TV at the smaller end. The calculator above does this for your exact distance.
What size TV is best for a living room?
Most living rooms seat people 8 to 12 feet from the TV, which suits a 55 to 75 inch screen. At 9 feet a 65 inch 4K TV is a comfortable sweet spot.
What size TV is best for a bedroom?
Bedrooms usually have a shorter 5 to 8 foot viewing distance, so a 43 to 55 inch TV fits well without overwhelming the wall.
How far should I sit from a 65 inch TV?
For a 65 inch 4K TV, about 6.5 to 9 feet is the ideal range: closer for a cinematic feel, farther for relaxed everyday viewing.
Can a TV be too big for a room?
Yes. If you sit too close for the screen size you have to move your eyes and head to follow the picture, which is tiring. Staying inside the recommended distance range keeps the whole screen in comfortable view.
Does 4K let me use a bigger TV?
Yes. Because 4K has four times the pixels of 1080p, you can sit closer without seeing pixels, so the same distance supports a larger screen.
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Design terms to know
Plain-language definitions from our interior design glossary.
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