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July 10th, 2019, 11:02 PM  #1 
Member Joined: Oct 2014 From: Mars Posts: 37 Thanks: 0  Calculate the TV size, based on distance from TV
Hi all, Assuming that a 124cm width screen is preferred when sitting 308cm away from the TV, what formula can I use to convert any distance to get the new desired width? Would be greatly appreciated if the formula was in layman/excel terms. Thanks! 
July 11th, 2019, 01:40 PM  #2 
Global Moderator Joined: May 2007 Posts: 6,823 Thanks: 723 
Direct proportion, i.e. width=constant times distance.

July 11th, 2019, 06:46 PM  #3 
Member Joined: Oct 2014 From: Mars Posts: 37 Thanks: 0 
Thanks mathman. For some reason I thought I might need to calculate the viewing angle cone. I guess constant makes it much easier. 
July 12th, 2019, 04:27 PM  #4 
Global Moderator Joined: May 2007 Posts: 6,823 Thanks: 723 
The expression I gave is based on the assumption the viewing angle cone is constant.


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