TV Screen Height and Width Dimensions & Viewing Distances

Last Modified: September 29, 2017

Discover What Size of TV is best for Your Room

A few years ago, buying a television was as easy as taking a walk in the park. During that time, the variations of TVs available were few, and the idea of a big screen topped at approximately 21 inches.

Technology advanced and televisions became more energy efficient and thinner, screens also grew larger.

Today, the TVs are many times larger than the first models, making it very crucial to know how TVs are measured to ensure that they fit perfectly where you want to place them in your room.

How Are TV Screens Measured?

All electronic screens, whether they are on a laptop computer, a tablet, or a flat screen TV, are measured diagonally as opposed to measuring them from side to side, or bottom to top. This measurement gives the actual size of the screen.

A tape measure can be used to measure from the top left-hand corner of the screen to the bottom right-hand side corner. The tape measure must be stretched straight across the centre of the screen, and any form of slack is avoided.

The measurements are taken within the bezel of the television so that the measurement recorded is of the visible part of the screen itself, instead of the whole housing of the television.

Common TV Aspect Ratios

Most of the televisions that are available today have an aspect ratio of 16:9, which provides perfect viewing of high definition TV shows.

Nonetheless, movies are normally filmed with a ratio of 21:9; this results in black bars at the bottom and top of the picture when it is shown on the average television. To rectify this, some manufacturers are making TVs with a 21:9 aspect ratio.

The size and position of black bars on your TV depend on two factors: the aspect ratio of the video that you are viewing and the aspect ratio of your TV. Any divergence between the two will be filled with black colour. This practice is referred to as letter-boxing.

Televisions with a 21:9 aspect ratio are quite rare and are only worth it if you solely watch movies with it. If you view normal 16:9 content, for instance, an HDTV channel on it, you will notice black bars on its sides. This significantly reduces the viewing area for the 16:9 video. A 58 inch 21:9 TV matches the same viewing area as a 47 inch TV for 16:9 video.

Most of the TV manufacturers such as Sharp, Vizio, Sony, Toshiba, Panasonic, LG, and Samsung manufacture TVs of 16:9 and 21:9 aspect ratios.

What is Formula for calculating Length and Width using Diagonal and aspect ratio?

Often it is very helpful to match the area of a TV screen display. For instance, if you go from a 22 inch to 24-inch screen, how much bigger will it be in terms of length and width? Will it fit the space you have?

The calculation needs several steps and the use of Pythagorean Theorem but basically is purely algebra.

Here are a few steps that you can follow in the calculation of the width and length of a TV.

To begin, you must know the aspect ratio. Usually, this will be 16:9 but in some cases it can be an aspect ratio of 16:10. The aspect ratio gives us the relative values of the height and width since it is essentially stating that for every 16 units of width, there will be 9 units of height.

Calculations

By the use of the Pythagorean Theorem, you know that in case you add the squares of the height (9) and width (16), you will get the value of the hypotenuse (diagonal) squared. In the case of a ratio of 16:9, 162 + 92 = 337. If you calculate the square root of this sum (√337), you will get 18.4.

This means simply that, when the height is 9 units and width 16 units, the diagonal will be 18.4 units. As the two screens with the same aspect ratio will always have the same diagonals, width and height, it is easy now to compute the exact dimensions based on the length of the diagonal.

The first step will be to find the ratio of the diagonal in inches, to the aspect ratio diagonal, which happens in this case to be an aspect ratio of 16:9 and 22-Inch screen will be 22/18.4= 1.198.

Use this number (1.198) to calculate directly the width and height in inches. Therefore, the width of the TV will be 16 x 1.198 = 19.17. The height, on the other hand, will be 9.0 x 1.198 = 10.78

The Different TV Sizes and Dimensions

Below is a list of 16:9 TV sizes and their respective dimensions. In the list, the viewing area is also included in square inches (sq.in).

Size of TV
in inches
Dimensions
Height x Width
in inches
Viewing Area
20 inch TV dimensions Height: 9.8 inch, Width: 17.4 inch Total Viewing Area: 170.1 inches
21 inch TV dimensions Height: 10.3 inch, Width: 18.3 inch Total Viewing Area: 187.6 inches
22 inch TV dimensions Height: 10.8 inch, Width: 19.1 inch Total Viewing Area: 205.9 inches
23 inch TV dimensions Height: 11.3 inch, Width: 20.0 inch Total Viewing Area: 225.0 inches
24 inch TV dimensions Height: 11.7 inch, Width: 20.9 inch Total Viewing Area: 245.0 inches
25 inch TV dimensions Height: 12.2 inch, Width: 21.7 inch Total Viewing Area: 265.8 inches
26 inch TV dimensions Height: 12.7 inch, Width: 22.6 inch Total Viewing Area: 287.5 inches
27 inch TV dimensions Height: 13.2 inch, Width: 23.5 inch Total Viewing Area: 310.1 inches
28 inch TV dimensions Height: 13.7 inch, Width: 24.3 inch Total Viewing Area: 333.5 inches
29 inch TV dimensions Height: 14.2 inch, Width: 25.2 inch Total Viewing Area: 357.7 inches
30 inch TV dimensions Height: 14.7 inch, Width: 26.1 inch Total Viewing Area: 382.8 inches
31 inch TV dimensions Height: 15.2 inch, Width: 27.0 inch Total Viewing Area: 408.7 inches
32 inch TV dimensions Height: 15.7 inch, Width: 27.8 inch Total Viewing Area: 435.5 inches
33 inch TV dimensions Height: 16.1 inch, Width: 28.7 inch Total Viewing Area: 463.2 inches
34 inch TV dimensions Height: 16.6 inch, Width: 29.6 inch Total Viewing Area: 491.7 inches
35 inch TV dimensions Height: 17.1 inch, Width: 30.4 inch Total Viewing Area: 521.0 inches
36 inch TV dimensions Height: 17.6 inch, Width: 31.3 inch Total Viewing Area: 551.2 inches
37 inch TV dimensions Height: 18.1 inch, Width: 32.2 inch Total Viewing Area: 582.3 inches
38 inch TV dimensions Height: 18.6 inch, Width: 33.0 inch Total Viewing Area: 614.2 inches
39 inch TV dimensions Height: 19.1 inch, Width: 33.9 inch Total Viewing Area: 646.9 inches
40 inch TV dimensions Height: 19.6 inch, Width: 34.8 inch Total Viewing Area: 680.5 inches
41 inch TV dimensions Height: 20.1 inch, Width: 35.7 inch Total Viewing Area: 715.0 inches
42 inch TV dimensions Height: 20.5 inch, Width: 36.5 inch Total Viewing Area: 750.3 inches
43 inch TV dimensions Height: 21.0 inch, Width: 37.4 inch Total Viewing Area: 786.4 inches
44 inch TV dimensions Height: 21.5 inch, Width: 38.3 inch Total Viewing Area: 823.4 inches
45 inch TV dimensions Height: 22.0 inch, Width: 39.1 inch Total Viewing Area: 861.3 inches
46 inch TV dimensions Height: 22.5 inch, Width: 40.0 inch Total Viewing Area: 900.0 inches
47 inch TV dimensions Height: 23.0 inch, Width: 40.9 inch Total Viewing Area: 939.6 inches
48 inch TV dimensions Height: 23.5 inch, Width: 41.7 inch Total Viewing Area: 980.0 inches
49 inch TV dimensions Height: 24.0 inch, Width: 42.6 inch Total Viewing Area: 1021.2 inches
50 inch TV dimensions Height: 24.5 inch, Width: 43.5 inch Total Viewing Area: 1063.3 inches
51 inch TV dimensions Height: 24.9 inch, Width: 44.3 inch Total Viewing Area: 1106.3 inches
52 inch TV dimensions Height: 25.4 inch, Width: 45.2 inch Total Viewing Area: 1150.1 inches
53 inch TV dimensions Height: 25.9 inch, Width: 46.1 inch Total Viewing Area: 1194.8 inches
54 inch TV dimensions Height: 26.4 inch, Width: 47.0 inch Total Viewing Area: 1240.3 inches
55 inch TV dimensions Height: 26.9 inch, Width: 47.8 inch Total Viewing Area: 1286.6 inches
56 inch TV dimensions Height: 27.4 inch, Width: 48.7 inch Total Viewing Area: 1333.8 inches
57 inch TV dimensions Height: 27.9 inch, Width: 49.6 inch Total Viewing Area: 1381.9 inches
58 inch TV dimensions Height: 28.4 inch, Width: 50.4 inch Total Viewing Area: 1430.8 inches
59 inch TV dimensions Height: 28.9 inch, Width: 51.3 inch Total Viewing Area: 1480.6 inches
60 inch TV dimensions Height: 29.3 inch, Width: 52.2 inch Total Viewing Area: 1531.2 inches
61 inch TV dimensions Height: 29.8 inch, Width: 53.0 inch Total Viewing Area: 1582.7 inches
62 inch TV dimensions Height: 30.3 inch, Width: 53.9 inch Total Viewing Area: 1635.0 inches
63 inch TV dimensions Height: 30.8 inch, Width: 54.8 inch Total Viewing Area: 1688.1 inches
64 inch TV dimensions Height: 31.3 inch, Width: 55.7 inch Total Viewing Area: 1742.2 inches
65 inch TV dimensions Height: 31.8 inch, Width: 56.5 inch Total Viewing Area: 1797.0 inches
66 inch TV dimensions Height: 32.3 inch, Width: 57.4 inch Total Viewing Area: 1852.7 inches
67 inch TV dimensions Height: 32.8 inch, Width: 58.3 inch Total Viewing Area: 1909.3 inches
68 inch TV dimensions Height: 33.3 inch, Width: 59.1 inch Total Viewing Area: 1966.7 inches
69 inch TV dimensions Height: 33.8 inch, Width: 60.0 inch Total Viewing Area: 2025.0 inches
70 inch TV dimensions Height: 34.2 inch, Width: 60.9 inch Total Viewing Area: 2084.1 inches
71 inch TV dimensions Height: 34.7 inch, Width: 61.7 inch Total Viewing Area: 2144.1 inches
72 inch TV dimensions Height: 35.2 inch, Width: 62.6 inch Total Viewing Area: 2204.9 inches
73 inch TV dimensions Height: 35.7 inch, Width: 63.5 inch Total Viewing Area: 2266.6 inches
74 inch TV dimensions Height: 36.2 inch, Width: 64.3 inch Total Viewing Area: 2329.1 inches
75 inch TV dimensions Height: 36.7 inch, Width: 65.2 inch Total Viewing Area: 2392.5 inches
76 inch TV dimensions Height: 37.2 inch, Width: 66.1 inch Total Viewing Area: 2456.7 inches
77 inch TV dimensions Height: 37.7 inch, Width: 67.0 inch Total Viewing Area: 2521.8 inches
78 inch TV dimensions Height: 38.2 inch, Width: 67.8 inch Total Viewing Area: 2587.7 inches
79 inch TV dimensions Height: 38.6 inch, Width: 68.7 inch Total Viewing Area: 2654.5 inches
80 inch TV dimensions Height: 39.1 inch, Width: 69.6 inch Total Viewing Area: 2722.1 inches
81 inch TV dimensions Height: 39.6 inch, Width: 70.4 inch Total Viewing Area: 2790.6 inches
82 inch TV dimensions Height: 40.1 inch, Width: 71.3 inch Total Viewing Area: 2859.9 inches
83 inch TV dimensions Height: 40.6 inch, Width: 72.2 inch Total Viewing Area: 2930.1 inches
84 inch TV dimensions Height: 41.1 inch, Width: 73.0 inch Total Viewing Area: 3001.1 inches
85 inch TV dimensions Height: 41.6 inch, Width: 73.9 inch Total Viewing Area: 3073.0 inches
86 inch TV dimensions Height: 42.1 inch, Width: 74.8 inch Total Viewing Area: 3145.7 inches
87 inch TV dimensions Height: 42.6 inch, Width: 75.7 inch Total Viewing Area: 3219.3 inches
88 inch TV dimensions Height: 43.0 inch, Width: 76.5 inch Total Viewing Area: 3293.8 inches
89 inch TV dimensions Height: 43.5 inch, Width: 77.4 inch Total Viewing Area: 3369.0 inches
90 inch TV dimensions Height: 44.0 inch, Width: 78.3 inch Total Viewing Area: 3445.2 inches
91 inch TV dimensions Height: 44.5 inch, Width: 79.1 inch Total Viewing Area: 3522.2 inches
92 inch TV dimensions Height: 45.0 inch, Width: 80.0 inch Total Viewing Area: 3600.0 inches
93 inch TV dimensions Height: 45.5 inch, Width: 80.9 inch Total Viewing Area: 3678.7 inches
94 inch TV dimensions Height: 46.0 inch, Width: 81.7 inch Total Viewing Area: 3758.2 inches
95 inch TV dimensions Height: 46.5 inch, Width: 82.6 inch Total Viewing Area: 3838.6 inches
96 inch TV dimensions Height: 47.0 inch, Width: 83.5 inch Total Viewing Area: 3919.8 inches
97 inch TV dimensions Height: 47.4 inch, Width: 84.3 inch Total Viewing Area: 4001.9 inches
98 inch TV dimensions Height: 47.9 inch, Width: 85.2 inch Total Viewing Area: 4084.9 inches
99 inch TV dimensions Height: 48.4 inch, Width: 86.1 inch Total Viewing Area: 4168.7 inches
100 inch TV dimensions Height: 48.9 inch, Width: 87.0 inch Total Viewing Area: 4253.3 inches
101 inch TV dimensions Height: 49.4 inch, Width: 87.8 inch Total Viewing Area: 4338.8 inches
102 inch TV dimensions Height: 49.9 inch, Width: 88.7 inch Total Viewing Area: 4425.1 inches
103 inch TV dimensions Height: 50.4 inch, Width: 89.6 inch Total Viewing Area: 4512.3 inches
104 inch TV dimensions Height: 50.9 inch, Width: 90.4 inch Total Viewing Area: 4600.4 inches
105 inch TV dimensions Height: 51.4 inch, Width: 91.3 inch Total Viewing Area: 4689.3 inches
106 inch TV dimensions Height: 51.8 inch, Width: 92.2 inch Total Viewing Area: 4779.0 inches
107 inch TV dimensions Height: 52.3 inch, Width: 93.0 inch Total Viewing Area: 4869.6 inches
108 inch TV dimensions Height: 52.8 inch, Width: 93.9 inch Total Viewing Area: 4961.1 inches
109 inch TV dimensions Height: 53.3 inch, Width: 94.8 inch Total Viewing Area: 5053.4 inches
110 inch TV dimensions Height: 53.8 inch, Width: 95.7 inch Total Viewing Area: 5146.5 inches
111 inch TV dimensions Height: 54.3 inch, Width: 96.5 inch Total Viewing Area: 5240.5 inches
112 inch TV dimensions Height: 54.8 inch, Width: 97.4 inch Total Viewing Area: 5335.3 inches
113 inch TV dimensions Height: 55.3 inch, Width: 98.3 inch Total Viewing Area: 5431.0 inches
114 inch TV dimensions Height: 55.8 inch, Width: 99.1 inch Total Viewing Area: 5527.6 inches
115 inch TV dimensions Height: 56.3 inch, Width: 100.0 inch Total Viewing Area: 5625.0 inches
116 inch TV dimensions Height: 56.7 inch, Width: 100.9 inch Total Viewing Area: 5723.3 inches
117 inch TV dimensions Height: 57.2 inch, Width: 101.7 inch Total Viewing Area: 5822.4 inches
118 inch TV dimensions Height: 57.7 inch, Width: 102.6 inch Total Viewing Area: 5922.3 inches
119 inch TV dimensions Height: 58.2 inch, Width: 103.5 inch Total Viewing Area: 6023.1 inches
120 inch TV dimensions Height: 58.7 inch, Width: 104.3 inch Total Viewing Area: 6124.8 inches
121 inch TV dimensions Height: 59.2 inch, Width: 105.2 inch Total Viewing Area: 6227.3 inches
122 inch TV dimensions Height: 59.7 inch, Width: 106.1 inch Total Viewing Area: 6330.6 inches
123 inch TV dimensions Height: 60.2 inch, Width: 107.0 inch Total Viewing Area: 6434.8 inches
124 inch TV dimensions Height: 60.7 inch, Width: 107.8 inch Total Viewing Area: 6539.9 inches
125 inch TV dimensions Height: 61.1 inch, Width: 108.7 inch Total Viewing Area: 6645.8 inches

What is the Ideal Viewing Distance?

perfect TV viewing distance

Sitting at the correct distance from your television is a crucial part of improving the viewing experience. If the TV is your first big HDTV, you may end-up being forced to re-consider your setup and watching distance.

The old-school tube characteristically had screens 36 inches or less, and you did not want to watch it too close as you would notice the screen’s scan lines.

However, with the current television model, sitting too far away from the TV may mean that you will miss some of the high-definition detail that you paid for.

To determine the screen size that will best fit your room and viewing distance, please refer to the table below:

Screen Viewing Distance Range

32 Inches » 4.0-6.7 feet
37 Inches » 4.6-7.7 feet
40 Inches » 5.0-8.3 feet
46 Inches » 5.7-9.5 feet
50 Inches » 6.3-10.4 feet
55 Inches » 6.9-11.5 feet
60 Inches » 7.5-12.5 feet

The Ideal TV Dimensions for Spaces Such as Bedroom, Living Room etc.

When you are choosing the TV to purchase for your home, you must consider these two things:

  • How far away from the television do you intend to sit?
  • How much room you have available to place your television.

For small living rooms, kitchens, and bedrooms (4 x 3) pick up to 32-inch televisions. View from a distance of not more than 1.5M.

For larger bedrooms and average-size rooms, pick TVs of between 32 and 39 inches and view the TV from 1.5M-2M. For even larger rooms, you can try TVs from 40 to 45 inches.

The HDTVs can be viewed at 2 metres away or 2.5 while the 4K TVs from 1.22M to 1.37M.

If you are living in a much bigger room and have a dedicated home cinema room (4.6 x 8.5M), pick a TV of between 46 and 55 inches and make sure you sit 3M away from it while watching.

Other Things to Consider When Buying a TV

When it comes to thickness, it is mostly for impressing your pals with the good appearance. A TV that looks slim appears a lot better in your living room compared to a bulky one. The thin TV will also be easy to mount on the wall as there is less bulk in the back.

A plasma TV is quite heavy. This is because each cell of gas that represents a colour of a pixel has its own chamber that is nestled between two panels of glass. To stand up to the difference of pressure between the gas chamber and the ambient air, the glass must be strong.

An LCD or LED screen is much lighter as it does not need panels of glass. The TV can be a simple plastic. OLED TVs are the slimmest as each light emitting diode produces its own light and is not backlit.

When it comes to the installation the TV to your room, most of the TV wall brackets can support different kinds of TVs.

What you must verify only is the load capacity of the wall mount TV bracket. The load capacity must be more than the weight of the TV that you intend to purchase.

If you get a strong mount, it won’t matter if the television is an LED or a Plasma.