4:3 Aspect Ratio Calculator Explained

By Last updated: July 03, 2023

4:3 Aspect Ratio Calculator

What is a 4:3 aspect ratio?

The 4:3, a fullscreen aspect ratio, is an early standard ratio for older televisions, computer monitors, and digital cameras. This ratio is 33% taller than the current most popular widescreen 16:9 aspect ratio used for everyday displays and video content.

16:9 vs 4:3 aspect ratio
16:9 vs 4:3 aspect ratio

The aspect ratio has a standard format of 4:3 or W:H, where W is the width, and H is the height of an image, screen, or container. In digital space, the measurement unit is in pixels. You can pronounce it "four-by-three" or "four-to-three" aspect ratio.

4:3 ratio formula

You can use the four-by-three ratio formula to check if an image or display has a 4:3 aspect ratio. First, you must determine the width and height of your image, video, or screen in centimeters, inches, or pixels. Then, divide the width by the height. If the answer is 1.333, then it has a 4:3 aspect ratio.

$${Ratio} = \frac{Width}{Height} = \frac{4}{3} = 1.33333$$

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

$${W} = {H} \times 1.333$$

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

$${H} = \frac{W}{1.333}$$

Common 4:3 resolutions

Here are the 4:3 resolutions you frequently find on photos, videos, digital cameras, laptops, and tablets.

WidthHeightPixel CountStandard
16012019,200QQVGA
32024076,800QVGA
640480307,200VGA
800600480,000SVGA
1,024768786,432XGA
1,6001,2001,920,000UXGA
2,0481,5363,145,728QXGA
3,2002,4007,680,000QUXGA
4,0963,07212,582,912HXGA
6,4004,80030,720,000HUXGA
Table 1: common resolutions of 4 x 3 content and display.

Common 4:3 screen sizes

Here are the width, height, and diagonal of various 4:3 image, video, or screen sizes in inches and centimeters.

4:3 screen sizing
DiagonalWidthHeight
1″
2.54 cm
0.8″
2.03 cm
0.6″
1.52 cm
2″
5.08 cm
1.6″
4.06 cm
1.2″
3.05 cm
3″
7.62 cm
2.4″
6.1 cm
1.8″
4.57 cm
4″
10.16 cm
3.2″
8.13 cm
2.4″
6.1 cm
5″
12.7 cm
4″
10.16 cm
3″
7.62 cm
6″
15.24 cm
4.8″
12.19 cm
3.6″
9.14 cm
7″
17.78 cm
5.6″
14.22 cm
4.2″
10.67 cm
8″
20.32 cm
6.4″
16.26 cm
4.8″
12.19 cm
9″
22.86 cm
7.2″
18.29 cm
5.4″
13.72 cm
10″
25.4 cm
8″
20.32 cm
6″
15.24 cm
11″
27.94 cm
8.8″
22.35 cm
6.6″
16.76 cm
12″
30.48 cm
9.6″
24.38 cm
7.2″
18.29 cm
13″
33.02 cm
10.4″
26.42 cm
7.8″
19.81 cm
14″
35.56 cm
11.2″
28.45 cm
8.4″
21.34 cm
15″
38.1 cm
12″
30.48 cm
9″
22.86 cm
16″
40.64 cm
12.8″
32.51 cm
9.6″
24.38 cm
17″
43.18 cm
13.6″
34.54 cm
10.2″
25.91 cm
18″
45.72 cm
14.4″
36.58 cm
10.8″
27.43 cm
19″
48.26 cm
15.2″
38.61 cm
11.4″
28.96 cm
20″
50.8 cm
16″
40.64 cm
12″
30.48 cm
21″
53.34 cm
16.8″
42.67 cm
12.6″
32 cm
22″
55.88 cm
17.6″
44.7 cm
13.2″
33.53 cm
23″
58.42 cm
18.4″
46.74 cm
13.8″
35.05 cm
24″
60.96 cm
19.2″
48.77 cm
14.4″
36.58 cm
25″
63.5 cm
20″
50.8 cm
15″
38.1 cm
26″
66.04 cm
20.8″
52.83 cm
15.6″
39.62 cm
27″
68.58 cm
21.6″
54.86 cm
16.2″
41.15 cm
28″
71.12 cm
22.4″
56.9 cm
16.8″
42.67 cm
29″
73.66 cm
23.2″
58.93 cm
17.4″
44.2 cm
30″
76.2 cm
24″
60.96 cm
18″
45.72 cm
32″
81.28 cm
25.6″
65.02 cm
19.2″
48.77 cm
34″
86.36 cm
27.2″
69.09 cm
20.4″
51.82 cm
40″
101.6 cm
32″
81.28 cm
24″
60.96 cm
42″
106.68 cm
33.6″
85.34 cm
25.2″
64.01 cm
43″
109.22 cm
34.4″
87.38 cm
25.8″
65.53 cm
48″
121.92 cm
38.4″
97.54 cm
28.8″
73.15 cm
50″
127 cm
40″
101.6 cm
30″
76.2 cm
Table 2: Diagonal, width, and height of 4 by 3 screen sizes.

FAQs

How do I calculate the 4:3 aspect ratio?

The 4:3 aspect ratio is a screen or image format that proportionally contains four units horizontally for every three vertically. It can be calculated by dividing the width by height and getting a value of 1.333.

For example, the ratio between the width and height of the VGA (640 x 480), SVGA (800 x 600), and XGA (1,024 × 768) resolutions are equal to 1.333.

How to use 4:3 aspect ratio calculator by Calculator Hub?

Our 4:3 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 4:3 aspect ratio. For instance, if you enter a width of 640 pixels, the calculator will calculate a height of 480 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.

4:3 Aspect Ratio Calculator

4:3 Aspect Ratio Calculator App

About this app

Use our 4:3 aspect ratio calculator to help you accurately resize or scale images, video, or screen resolution to perfect 4 by 3 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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