What TV size fits a 4-meter seat? The 30 to 40 degree range

The 40 degree figure is the THX cinema target, and the 30 degree figure is the one widely quoted as SMPTE's. The 30 is an older reference and not a current rule, so use it as a geometry marker. Both angles come from the screen's width and your distance.

From 4 meters, 97-inch TVs fill 30 degrees and 132-inch TVs fill 40. Only one retail TV lands inside that band, the 98-inch TV. A projector screen can fill the rest of the band: a 100-inch screen fills 30.9 degrees from 4 meters, and a 120-inch screen fills 36.7.

Measure from the front of the screen to your eyes in the spot where you'll sit. The 98-inch TV fills 30.3 degrees from 4 meters, just over the 30 degree reference, so it's the smallest picture that gets there. An 85-inch TV falls short at 26 degrees.

The 98-inch TV is 217 cm wide, so check the wall first. If you want a picture that fills more of the band than a TV can, the 100-inch and 120-inch projector screen pages show their seat ranges.