TV Viewing Distance Calculator. The calculator will tell you what the optimal seating distances are for the selected TV screen size. Best TVs (best buy) on Amazon.
TV Viewing Distance Calculator
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How to Use the Calculator
The calculator needs three pieces of information. The first is how far you sit from the screen, measured in meters. The second is what shape your screen is, and the third is screen size. You may enter either the diagonal screen size or the screen width. See the sketch below for details. (If you enter screen width, don’t forget to check the appropriate radio button)
If you do not specify a viewing distance, the calculator will tell you what the optimal seating distances are for the selected screen size.
This diagram shows the data required to use the calculator and interpret the results.
Interpreting the Results
The calculator calculates the following:
–Current viewing angle: Based on the inputs, this is the viewing angle or arc for your set up.
–Maximum recommended viewing distance: Based on data from Electrohome, which suggests a viewing distance of three to six screen widths for video. This corresponds to the point at which most people will begin having trouble picking out details and reading the screen. Probably too far away to be effective for home theater, OK for everyday TV viewing. Most people are comfortable watching TV between this distance and half this distance.
–Maximum SMPTE recommended viewing distance: SMPTE standard EG-18-1994 recommends a minimum viewing angle of 30 degrees for movie theaters. This seems to be becoming a de facto standard for front projection home theaters also. Viewing from this distance or closer will result in a more immersive experience, and also lessen eye strain caused by watching a smaller image in a dark room.
–Maximum and Recommended THX viewing distances: THX also publishes standards for movie theaters to adhere to for THX certification. THX requires that the back row of seats in a theater have at least a 26 degree viewing angle and recommends a 36 degree viewing angle.
–SMPTE and THX screen widths: Based on the viewing distance supplied to the calculator, these are the minimum screen widths required to meet the SMPTE and THX recommendations discussed above.
–Viewing Distances based on Visual Acuity</em>: These distances are calculated based on the resolving power of the human eye (reference), or visual acuity. The human eye with 20/20 vision can detect or resolve details as small as 1/60th of a degree of arc. These distances represent the point beyond which some of the detail in the picture is no longer able to be resolved and “blends” with adjacent detail.
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