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-   -   Calculate the TV size, based on distance from TV (http://mymathforum.com/geometry/346735-calculate-tv-size-based-distance-tv.html)

Apple30 July 10th, 2019 11:02 PM

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!;)

mathman July 11th, 2019 01:40 PM

Direct proportion, i.e. width=constant times distance.

Apple30 July 11th, 2019 06:46 PM

Thanks mathman. For some reason I thought I might need to calculate the viewing angle cone. I guess constant makes it much easier.

:)

mathman July 12th, 2019 04:27 PM

The expression I gave is based on the assumption the viewing angle cone is constant.


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