4:5 Aspect Ratio

Resolutions, uses and the formula for the 4:5 aspect ratio.

4:5 aspect ratio = 0.800

Used for Instagram portrait posts. Height = width × 5 ÷ 4.

Ratio
:
Size in pixels
×
Change the width or height and the other one follows the ratio. Change both to find the ratio.
16:9aspect ratio
1.78as a decimal
16:9closest standard
2.07megapixels
1920 × 1080
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    Common 4:5 resolutions

    Width × heightMegapixels
    320 × 4000.13
    480 × 6000.29
    640 × 8000.51
    720 × 9000.65
    960 × 12001.15
    1080 × 13501.46
    1280 × 16002.05
    1440 × 18002.59
    1600 × 20003.20
    1920 × 24004.61

    What is the 4:5 ratio used for?

    4:5 means 4 units wide for 5 units high. It is used for Instagram portrait posts. As a decimal, the width is 0.800 times the height.

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    How to calculate 4:5 sizes

    • From a width: height = width × 5 ÷ 4.
    • From a height: width = height × 4 ÷ 5.
    • Round to even numbers for video.
    • Changing the ratio of an image means cropping it or adding bars: resizing alone would stretch it.

    Other aspect ratios

    16:94:321:99:164:53:21:116:10

    Popular resolutions:

    1920 × 10801280 × 7203840 × 21602560 × 14401080 × 19201080 × 13501080 × 10802560 × 10803440 × 14401366 × 7681440 × 9001024 × 768

    Updated October 2026.

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    Frequently asked questions

    What resolutions are 4:5?

    Common ones: 320 × 400, 480 × 600, 640 × 800, 720 × 900, 960 × 1200, 1080 × 1350.

    What is 4:5 used for?

    It is used for Instagram portrait posts.

    How do I calculate a 4:5 size?

    Height = width × 5 ÷ 4. Width = height × 4 ÷ 5. Or type one side in the calculator above.

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