1:1 Aspect Ratio

Resolutions, uses and the formula for the 1:1 aspect ratio.

1:1 aspect ratio = 1.000

Used for square posts. Height = width × 1 ÷ 1.

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 1:1 resolutions

    Width × heightMegapixels
    320 × 3200.10
    480 × 4800.23
    640 × 6400.41
    720 × 7200.52
    960 × 9600.92
    1080 × 10801.17
    1280 × 12801.64
    1440 × 14402.07
    1600 × 16002.56
    1920 × 19203.69

    What is the 1:1 ratio used for?

    1:1 means 1 units wide for 1 units high. It is used for square posts. As a decimal, the width is 1.000 times the height.

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    How to calculate 1:1 sizes

    • From a width: height = width × 1 ÷ 1.
    • From a height: width = height × 1 ÷ 1.
    • 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 1:1?

    Common ones: 320 × 320, 480 × 480, 640 × 640, 720 × 720, 960 × 960, 1080 × 1080.

    What is 1:1 used for?

    It is used for square posts.

    How do I calculate a 1:1 size?

    Height = width × 1 ÷ 1. Width = height × 1 ÷ 1. Or type one side in the calculator above.

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