What TV size fits a 3-meter seat? The 30 to 40 degree range

The band is wider here than at a shorter seat, because both ends of it grow with distance. The 40 degree end is the THX cinema target, and the 30 degree end is the figure widely quoted as SMPTE's. That older reference isn't a current rule, so treat it as geometry.

From 3 meters, 73-inch TVs fill 30 degrees and 99-inch TVs fill 40. The retail TVs inside that band run from the 75-inch TV to the 98-inch TV. Anything in between works, so the choice comes down to the wall, the budget and how much of your view you want the picture to fill.

Measure from the front of the screen to your eyes in the spot where you'll sit. The 98-inch TV fits too: it fills 39.8 degrees from 3 meters, inside the 40 degree target. At the other end, the 75-inch TV fills 30.9 degrees, just over the 30 degree reference.

A 65-inch TV falls short at 27 degrees, so step up a size if you want the picture to fill the view. The 98-inch TV is 217 cm wide, so measure the wall before you pick it.