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July 10th, 2019, 11:02 PM   #1
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Question 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!
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July 11th, 2019, 01:40 PM   #2
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Direct proportion, i.e. width=constant times distance.
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July 11th, 2019, 06:46 PM   #3
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Thanks mathman. For some reason I thought I might need to calculate the viewing angle cone. I guess constant makes it much easier.

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July 12th, 2019, 04:27 PM   #4
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The expression I gave is based on the assumption the viewing angle cone is constant.
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