In order to determine the height that the TV should be mounted, we first need to know the size of the TV, the viewing distance from the TV, the eye level height from the floor and the reclining sitting angle. Let me bring some easy to follow formulas and then I will explain them:
Viewing Distance (VD) is the distance from where you should be sitting, to the wall of where the TV will be mounted. You can find the VD if you know your TV Size (TVS) from the following formula:
(1)Viewing Distance (VD)=TVS/0.55
For example if your TV size (TVS) is 55in then the viewing Distance (VD) should be 100 inches (55/0.55).
Before we can calculate the TV Mounting Height (TVMH) we need to measure your Eye Level Height (ELH) from the floor, while you a sitting down on your couch. Once you measure your ELH we can find the TVMH by the following formula:
(2)TV Mounting Height (TVMH) =ELH+(VD*0.22)—To the midpoint of the TV
For example when I sit on my couch my ELH from the floor is 39 inches and the VD is 100 inches (see previous example) so my TVMH is 39+(100*0.22)=61 inches from the floor to the midpoint of the TV. So here is a table:
TV Size (in) Viewing Distance (in) TV Mounting Height (in) at ELH=39in
32 58 (4.8ft) ELH+13 = 52 in
37 67 (5.6ft) ELH+15 = 54 in
42 76 (6.4ft) ELH+17 = 56 in
46 84 (7.0ft) ELH+18 = 57 in
55 100 (8.3ft) ELH+22 = 61 in
65 118 (10.0ft) ELH+26 = 63 in
70 127 (10.6ft) ELH+28 = 65 in
Formula 1 is based to about 30 degrees of viewing angle that are within the limits of the Society of Motion Picture and Television Engineers, THX and manufacturers’ recommendations for 16:9 HDTV’s.
Formula 2 is based on the average reclining angle of about 12.5 degrees from vertical ( sitting up straight) for casual sitting. Manufacturers range for casual sitting is 10-15 degrees.
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