# Viewing distance vs screen size

Discussion in 'Displays' started by DaveD', Oct 27, 2003.

1. ### DaveD' Stunt Coordinator

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What's the rule of thumb for viewing distance vs how big the screen should be? I sit about 9-10' away from my 25" tv in a 12'x13' room and it's a bit too small. I try to judge from floor displays at electronic stores but due to the size of the showroom it's just not the same.

2. ### dave_brogli Screenwriter

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I sit about 8-9 feet away from my 36" Tv and Im quite pleased

3. ### JohnnyG Screenwriter

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The 'formula' is, for a high-definition signal, you should view from a distance of 3.3 times the picture height. For interlaced NTSC, it's 8 times the picture height, but since all the HD sets perform line-doubling (at least), a better figure to use is 5 times the picture height.

Based on this, a widescreen set around 51" diagonal would be in order for your viewing distance.

4. ### Bob McElfresh Producer

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You can use this Viewing Distance Calculator to get the THX recommended distance (based on viewing angle) or the SMTP distance based on resolution.

5. ### Cameron Yee Executive Producer Reviewer

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I sit 8' from my 42". With that viewing calculator I would pay most attention to the last section, visual acuity. There's no way I would sit so close to my TV based on the viewing angle numbers.

6. ### Christo Ramo Stunt Coordinator

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I am going for a 40" and I will be sitting 14' feet away. You should be OK with a 32", but I would just go the distance for the 36".

7. ### Neil Joseph Lead Actor

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Moving to displays area.

8. ### Gabriel_Lam Screenwriter

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11' away from a 100" 16:9 here.

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