The optimal viewing distance for a 55-inch TV is about 4.2 meters.
1, the best viewing distance of the general television should be about 3 times the diagonal length of the television screen, that is, the viewing distance = screen diagonal length x3.
2, the number of inches of the television is the screen diagonal length of the television, according to 1 inch = 2.54 centimeters, which can be obtained from the screen of the 55-inch television diagonal length of 55x2.54 = 139.7 centimeters.
3, therefore, the best viewing distance of 55-inch TV for 139.7x3 = 419.1 cm ≈ 4.2 meters. So the best viewing distance for a 55-inch 4k TV is about 4.2.
Expanded information: 32-inch: 2 meters 37-inch: 2.5 meters< 40″: 2.8 meters 42″: 3 meters 46″: 3.5 meters 48″: 3.8 meters 50″: 4 meters 52″: 4.2 meters 55″: 4.5 meters 60″: 4.7 meters Ultra HD or 4K TVs It can be less