What is a 4:6 aspect ratio?
The 4:6 aspect ratio is equivalent to the 2:3 aspect ratio and is one of the most commonly used sizes in still photography and print. It originated from 35 mm film[1], which allowed for portrait-oriented 4:6 or landscape-oriented 6:4 photography.
The 4:6 ratio is 35.71% taller than the 1:1 square aspect ratio and 12.5% shorter than the 9:16 tall aspect ratio.

The aspect ratio has a standard format of 4:6 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 "four-by-six" or "four-to-six" aspect ratio.
4:6 ratio formula
You can use the four-by-six ratio formula to determine if an image or display has a 4:6 or 2:3 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 0.66667
, then it has a 4:6 aspect ratio.
To find a new width (W) from a desired height (H):
To find a new height (H) from a desired width (W):
4x6 photo printing resolutions
Below are the minimum resolution requirements for different quality levels when printing 4-inch x 6-inch photos to ensure prints maintain a high level of detail and clarity.
Width (px) | Height (px) | Pixel Count | Printing Resolution |
---|---|---|---|
288 | 432 | 124,416 | 72 dpi |
812 | 1218 | 1,572,864 | 203 dpi |
1200 | 1800 | 2,160,000 | 300 dpi |
2400 | 3600 | 8,640,000 | 600 dpi |
4800 | 7200 | 34,560,000 | 1200 dpi |
5760 | 8640 | 49,766,400 | 1440 dpi |
Check our PPI calculator to learn more about the differences between DPI and PPI.
Common 4:6 screen sizes
Here are the width, height, and diagonal of various 4:6 image, video, or screen sizes in inches and centimeters.

Diagonal | Width | Height |
---|---|---|
1″ 2.54 cm | 0.55″ 1.41 cm | 0.83″ 2.11 cm |
2″ 5.08 cm | 1.11″ 2.82 cm | 1.66″ 4.23 cm |
3″ 7.62 cm | 1.66″ 4.23 cm | 2.5″ 6.34 cm |
4″ 10.16 cm | 2.22″ 5.64 cm | 3.33″ 8.45 cm |
5″ 12.7 cm | 2.77″ 7.04 cm | 4.16″ 10.57 cm |
6″ 15.24 cm | 3.33″ 8.45 cm | 4.99″ 12.68 cm |
7″ 17.78 cm | 3.88″ 9.86 cm | 5.82″ 14.79 cm |
8″ 20.32 cm | 4.44″ 11.27 cm | 6.66″ 16.91 cm |
9″ 22.86 cm | 4.99″ 12.68 cm | 7.49″ 19.02 cm |
10″ 25.4 cm | 5.55″ 14.09 cm | 8.32″ 21.13 cm |
11″ 27.94 cm | 6.1″ 15.5 cm | 9.15″ 23.25 cm |
12″ 30.48 cm | 6.66″ 16.91 cm | 9.98″ 25.36 cm |
13″ 33.02 cm | 7.21″ 18.32 cm | 10.82″ 27.47 cm |
14″ 35.56 cm | 7.77″ 19.73 cm | 11.65″ 29.59 cm |
15″ 38.1 cm | 8.32″ 21.13 cm | 12.48″ 31.7 cm |
16″ 40.64 cm | 8.88″ 22.54 cm | 13.31″ 33.81 cm |
17″ 43.18 cm | 9.43″ 23.95 cm | 14.14″ 35.93 cm |
18″ 45.72 cm | 9.98″ 25.36 cm | 14.98″ 38.04 cm |
19″ 48.26 cm | 10.54″ 26.77 cm | 15.81″ 40.15 cm |
20″ 50.8 cm | 11.09″ 28.18 cm | 16.64″ 42.27 cm |
21″ 53.34 cm | 11.65″ 29.59 cm | 17.47″ 44.38 cm |
22″ 55.88 cm | 12.2″ 31 cm | 18.31″ 46.49 cm |
23″ 58.42 cm | 12.76″ 32.41 cm | 19.14″ 48.61 cm |
24″ 60.96 cm | 13.31″ 33.81 cm | 19.97″ 50.72 cm |
25″ 63.5 cm | 13.87″ 35.22 cm | 20.8″ 52.84 cm |
26″ 66.04 cm | 14.42″ 36.63 cm | 21.63″ 54.95 cm |
27″ 68.58 cm | 14.98″ 38.04 cm | 22.47″ 57.06 cm |
28″ 71.12 cm | 15.53″ 39.45 cm | 23.3″ 59.18 cm |
29″ 73.66 cm | 16.09″ 40.86 cm | 24.13″ 61.29 cm |
30″ 76.2 cm | 16.64″ 42.27 cm | 24.96″ 63.4 cm |
32″ 81.28 cm | 17.75″ 45.09 cm | 26.63″ 67.63 cm |
34″ 86.36 cm | 18.86″ 47.9 cm | 28.29″ 71.86 cm |
40″ 101.6 cm | 22.19″ 56.36 cm | 33.28″ 84.54 cm |
42″ 106.68 cm | 23.3″ 59.18 cm | 34.95″ 88.76 cm |
43″ 109.22 cm | 23.85″ 60.58 cm | 35.78″ 90.88 cm |
48″ 121.92 cm | 26.63″ 67.63 cm | 39.94″ 101.44 cm |
50″ 127 cm | 27.74″ 70.45 cm | 41.6″ 105.67 cm |
55″ 139.7 cm | 30.51″ 77.49 cm | 45.76″ 116.24 cm |
58″ 147.32 cm | 32.17″ 81.72 cm | 48.26″ 122.58 cm |
60″ 152.4 cm | 33.28″ 84.54 cm | 49.92″ 126.8 cm |
65″ 165.1 cm | 36.06″ 91.58 cm | 54.08″ 137.37 cm |
70″ 177.8 cm | 38.83″ 98.63 cm | 58.24″ 147.94 cm |
75″ 190.5 cm | 41.6″ 105.67 cm | 62.4″ 158.51 cm |
77″ 195.58 cm | 42.71″ 108.49 cm | 64.07″ 162.73 cm |
83″ 210.82 cm | 46.04″ 116.94 cm | 69.06″ 175.41 cm |
85″ 215.9 cm | 47.15″ 119.76 cm | 70.72″ 179.64 cm |
86″ 218.44 cm | 47.7″ 121.17 cm | 71.56″ 181.75 cm |
97″ 246.38 cm | 53.81″ 136.67 cm | 80.71″ 205 cm |
98″ 248.92 cm | 54.36″ 138.08 cm | 81.54″ 207.11 cm |
FAQs
How do I calculate the 4:6 aspect ratio?
The 4:6 aspect ratio is a screen or image format that proportionally contains four units horizontally for every six vertically. It can be calculated by dividing the width by height and getting a value of 0.66667.
For example, the ratio between the width and height of the Vertical HVGA (320 x 480)[2] and 1280 x 1920 resolutions equals 0.66667.
How to use 4:6 aspect ratio calculator by Calculator Hub?
Our 4:6 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 4:6 aspect ratio. For instance, if you enter a width of 1200 pixels, the calculator will calculate a height of 1800 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.
What is the best resolution for printing 4x6 photos?
For high-quality printing at 300 ppi
, 4x6 photos require a minimum resolution of 1200 x 1800
pixels to ensure one-to-one correspondence between image pixels and printing dots.