Two ways to think about “too close” and “too far”
Viewing angle. Cinema standards describe how much of your view the screen should fill. SMPTE recommends that the screen width covers at least about 30° of your field of view — a comfortable, living-room feel. THX recommends about 40° for a cinema-like, immersive picture. The calculator gives both: sit between them.
Resolution. A person with normal eyesight can just separate details about one arcminute apart. Beyond a certain distance, the extra pixels of a 4K screen are invisible and a 1080p picture looks the same. The table shows those distances, so you know when paying for 4K (or 8K) actually helps.
Rules of thumb
- For a 16:9 TV, sitting about 1.2 to 1.6 times the diagonal away is the 40°–30° range. A 55-inch TV works well at roughly 5.5 to 7.5 feet.
- Most Indian living rooms put the sofa 8–10 feet from the wall. That suits a 65 to 75-inch TV, or a 100-inch projector screen for a cinema feel.
- For a projector, measure the throw distance from the projector’s manual as well: the lens decides how big a picture it can make from where you mount it.
- Mount the screen so the centre is near eye height when seated — about 100–110 cm from the floor for most sofas. Looking up for two hours is uncomfortable.
CinemaScope screens
Many films are shot in the wide 2.39:1 shape. On a 16:9 TV they show black bars above and below. If you build a dedicated room with a 2.39:1 projector screen, choose “2.39:1”: the same diagonal gives a wider, shorter picture, so you can sit a little further back.
Questions
What size TV for a 10 feet viewing distance?
For 16:9, about 75 to 100 inches gives a 30°–40° viewing angle. A 75-inch TV is comfortable; a 100-inch projector screen feels like a cinema.
Is it bad for the eyes to sit close to a big TV?
No lasting harm is known, but very close seating can feel tiring because you have to move your eyes and head to follow the action. The 30°–40° range avoids that.
Does 4K matter at my distance?
Check the “full 4K detail” row. If you sit further away than that, a 4K screen will look much like 1080p, though 4K TVs often have better processing and HDR anyway.
How is screen size measured?
Diagonally, corner to corner of the visible picture, in inches. One inch is 2.54 cm.
Sources
Last checked 2026-11-11. Free to use; please check important details before you rely on them.