1:2 Aspect Ratio Calculator Explained

By Last updated: January 14, 2024

1:2 Aspect Ratio Calculator

What is a 1:2 aspect ratio?

The 1:2 or 9:18 aspect ratio is a smartphone's most commonly used ratio on devices such as LG G6[1], Google Pixel 2 XL[2], and Sony Xperia XZ3. It's a vertical orientation of the landscape's 2:1 or 18:9 aspect ratio, a popular cinematic format for movie production.

The 1:2 ratio is twice as tall as the 1:1 square aspect ratio and 12.5% taller than the 9:16 tall aspect ratio.

1:2 vs 1:1 vs 9:16 aspect ratio
1:1 vs 1:2 vs 9:16 aspect ratio

The aspect ratio has a standard format of 1:2 or W:H, where W refers to the width, and H refers to the height of an image, screen, or container. In digital space, the measurement unit is in pixels. You can pronounce it "one-by-two" or "one-to-two" aspect ratio.

1:2 or 18:9 ratio formula

You can use the one-by-two ratio formula to determine if an image or display has a 1:2 or 9:18 aspect ratio. First, measure the width and height of your image, video, or screen in either centimeters, inches, or pixels. Next, divide the width by the height. If the result is equal to 0.5, then it has a 1:2 aspect ratio.

$${Ratio} = \frac{Width}{Height} = \frac{1}{2} = 0.5$$

To find a new width (W) from a desired height (H):

$${W} = {H} \times 0.5$$

To find a new height (H) from a desired width (W):

$${H} = \frac{W}{0.5} = {W} \times {2}$$

1:2 resolution cheat sheet

Here are the 1:2 resolutions on vertical photos, videos, smartphones, tablets, laptops, and monitors.

Width (px)Height (px)Pixel CountStandard
6401280819,200Vertical 720p
7201280921,600Vertical HD+
96019201,843,200Vertical 1080p
108021602,332,800Vertical FHD+
144028804,147,200Vertical QHD+
216043209,331,200Vertical 4K UHD+
2880576016,588,800Vertical 5K UHD+
4320864037,324,800Vertical 8K UHD+
Table 1: common resolutions of 1 x 2 content and display.

1:2 dimensions cheat sheet

Here are the dimensions, in inches and centimeters, for everyday display and printing sizes with diagonals ranging from 1 to 98 inches.

1:2 or 9:18 screen sizing
1:2 or 9:18 aspect ratio screen sizing
DiagonalWidthHeight
1″
2.54 cm
0.45″
1.14 cm
0.89″
2.27 cm
2″
5.08 cm
0.89″
2.27 cm
1.79″
4.54 cm
3″
7.62 cm
1.34″
3.41 cm
2.68″
6.82 cm
4″
10.16 cm
1.79″
4.54 cm
3.58″
9.09 cm
5″
12.7 cm
2.24″
5.68 cm
4.47″
11.36 cm
6″
15.24 cm
2.68″
6.82 cm
5.37″
13.63 cm
7″
17.78 cm
3.13″
7.95 cm
6.26″
15.9 cm
8″
20.32 cm
3.58″
9.09 cm
7.16″
18.17 cm
9″
22.86 cm
4.02″
10.22 cm
8.05″
20.45 cm
10″
25.4 cm
4.47″
11.36 cm
8.94″
22.72 cm
11″
27.94 cm
4.92″
12.5 cm
9.84″
24.99 cm
12″
30.48 cm
5.37″
13.63 cm
10.73″
27.26 cm
13″
33.02 cm
5.81″
14.77 cm
11.63″
29.53 cm
14″
35.56 cm
6.26″
15.9 cm
12.52″
31.81 cm
15″
38.1 cm
6.71″
17.04 cm
13.42″
34.08 cm
16″
40.64 cm
7.16″
18.17 cm
14.31″
36.35 cm
17″
43.18 cm
7.6″
19.31 cm
15.21″
38.62 cm
18″
45.72 cm
8.05″
20.45 cm
16.1″
40.89 cm
19″
48.26 cm
8.5″
21.58 cm
16.99″
43.17 cm
20″
50.8 cm
8.94″
22.72 cm
17.89″
45.44 cm
21″
53.34 cm
9.39″
23.85 cm
18.78″
47.71 cm
22″
55.88 cm
9.84″
24.99 cm
19.68″
49.98 cm
23″
58.42 cm
10.29″
26.13 cm
20.57″
52.25 cm
24″
60.96 cm
10.73″
27.26 cm
21.47″
54.52 cm
25″
63.5 cm
11.18″
28.4 cm
22.36″
56.8 cm
26″
66.04 cm
11.63″
29.53 cm
23.26″
59.07 cm
27″
68.58 cm
12.07″
30.67 cm
24.15″
61.34 cm
28″
71.12 cm
12.52″
31.81 cm
25.04″
63.61 cm
29″
73.66 cm
12.97″
32.94 cm
25.94″
65.88 cm
30″
76.2 cm
13.42″
34.08 cm
26.83″
68.16 cm
32″
81.28 cm
14.31″
36.35 cm
28.62″
72.7 cm
34″
86.36 cm
15.21″
38.62 cm
30.41″
77.24 cm
40″
101.6 cm
17.89″
45.44 cm
35.78″
90.87 cm
42″
106.68 cm
18.78″
47.71 cm
37.57″
95.42 cm
43″
109.22 cm
19.23″
48.84 cm
38.46″
97.69 cm
48″
121.92 cm
21.47″
54.52 cm
42.93″
109.05 cm
50″
127 cm
22.36″
56.8 cm
44.72″
113.59 cm
55″
139.7 cm
24.6″
62.48 cm
49.19″
124.95 cm
58″
147.32 cm
25.94″
65.88 cm
51.88″
131.77 cm
60″
152.4 cm
26.83″
68.16 cm
53.67″
136.31 cm
65″
165.1 cm
29.07″
73.83 cm
58.14″
147.67 cm
70″
177.8 cm
31.3″
79.51 cm
62.61″
159.03 cm
75″
190.5 cm
33.54″
85.19 cm
67.08″
170.39 cm
77″
195.58 cm
34.44″
87.47 cm
68.87″
174.93 cm
83″
210.82 cm
37.12″
94.28 cm
74.24″
188.56 cm
85″
215.9 cm
38.01″
96.55 cm
76.03″
193.11 cm
86″
218.44 cm
38.46″
97.69 cm
76.92″
195.38 cm
97″
246.38 cm
43.38″
110.18 cm
86.76″
220.37 cm
98″
248.92 cm
43.83″
111.32 cm
87.65″
222.64 cm
Table 2: Diagonal, width, and height of 1 by 2 screen sizes cheat sheet.

FAQs

How do I calculate the 1:2 aspect ratio?

The 1:2 aspect ratio is a screen or image format that proportionally contains one unit horizontally for every two vertically. It can be calculated by dividing the width by height and getting a value of 0.5.

For example, the ratio between the width and height of the QHD+ (1440 x 2880) and FHD+ (1080 x 2160)[3] resolutions equals 0.5.

How to use 1:2 aspect ratio calculator by Calculator Hub?

Our 1:2 aspect ratio calculator is easy to use. You only need to input one dimension (width or height), and the calculator will automatically calculate the other dimension based on the 1:2 aspect ratio. For instance, if you enter a width of 540 pixels, the calculator will calculate a height of 1080 pixels.

On top of that, by entering a screen diagonal, you will also get additional information, including the screen's width, height, pixel density, and more.

1:2 Aspect Ratio Calculator

1:2 Aspect Ratio Calculator App

About this app

Use our 1:2 aspect ratio calculator to help you accurately resize or scale images, video, or screen resolution to perfect 1 by 2 dimensions. You will also learn more about the aspect ratio, formula, and calculation examples.

App availability

You can use the calculator for free as a PWA web app online or install it locally on any modern operating system, including Android, iOS, Windows 11/10, and macOS.

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References

3 Sources

  1. ⬆️ Levant L. LG G6 - Platinum Color | LG Levant. LG Levant. Published 2023. Accessed January 22, 2024.

    https://www.lg.com/levant_en/mobile-phones/lg-G6-platinum
  2. ⬆️ Pixel phone hardware tech specs - Pixel Phone Help. Google.com. Published 2019. Accessed January 22, 2024.

    https://support.google.com/pixelphone/answer/7158570
  3. ⬆️ Moto Z3 play - Specifications| Motorola Support US. Motorola.com. Published 2024. Accessed January 22, 2024.

    https://en-us.support.motorola.com/app/answers/detail/a_id/130460/~/moto-z3-play---specifications