TV Size Calculator

There is a sweet spot for TV size based on viewing distance. For a typical living room, the recommended diagonal is roughly the viewing distance divided by 1.5 to 2.5. Sitting 2 m back in a living room (the default here) puts the recommendation at 39 to 65 inches, with the closest standard size being 55 inches. Too small and the TV looks lost in the room; too large and the eyes strain trying to track action across the screen.

The optimal range varies by room type. A bedroom, where viewing is more casual and often from bed, uses a tighter ratio (1.2 to 1.5x distance) which means smaller screens. A dedicated cinema room, where the goal is full immersion, uses 2.5 to 3x distance and rewards the biggest screen the room can take. The calculator switches the ratio when you change the room type, so a cinema setup at 2 m gets a recommendation closer to 75 inches.

The old 'three times screen height' viewing rule was written for 1080p, where pixels become visible if you sit too close. With 4K, you can sit much closer without seeing individual pixels, which means a bigger screen at the same distance is now optimal. For an 8K screen the rule changes again; you would need to sit on the screen to see the difference.

Practical limits matter too. A 75-inch TV needs about 1.7 m of clear wall width and a sturdy mount or stand rated for around 35 kg. Check the stand width if your unit is fixed; a 65-inch TV is usually 1.45 m wide which is near the limit of standard 1.5 m TV units. For internet speed sufficient to stream 4K reliably, [Broadband Speed Converter](/broadband-speed-converter) shows how Mbps translates to download speed for streaming.