Aspect ratios
1:1 Aspect Ratio Calculator for Square Images
Calculate square dimensions, compare 1080×1080 and other 1:1 sizes, and understand how much a square crop removes.
A 1:1 aspect ratio has equal width and height. Every square, from a 64 × 64 icon to a 1080 × 1080 image, has this ratio. The shape stays square regardless of resolution.
Resize With This Ratio — 1:1
Change either side. The other updates proportionally. Results show whole pixels and the exact value before rounding.
Exact height: 1080 px
How the ratio is calculated
1080 ÷ 1080 = 1; 1080 ÷ 1080 = 1. Dividing both sides by the same value preserves the proportions and gives 1:1. 1080 is the greatest common divisor of these dimensions.
Height = width × 1 ÷ 1. Width = height × 1 ÷ 1. These formulas change size without changing shape. They do not crop or pad the source.
One dimension determines the other
For a square output, a width of 800 pixels requires a height of 800 pixels. There is no fractional-pixel rounding when the requested side is a whole number. Higher dimensions produce more pixels, not a different shape.
Square crop versus square padding
A centered square crop of 1920 × 1080 keeps 1080 × 1080. It removes 420 pixels from each side and retains 56.25% of the original area. Padding extends the shorter side instead, producing 1920 × 1920 while retaining the original image inside the square canvas.
Square assets and circular displays
A profile image may be stored as a square but displayed inside a circle. Keep important text and facial features away from the corners when the destination clips the image. This calculator models the rectangular canvas; it does not simulate circular masks or change your file.
1:1 resizing examples
| Width | Exact height | Rounded height |
|---|---|---|
| 320 px | 320 px | 320 px |
| 640 px | 640 px | 640 px |
| 1080 px | 1080 px | 1080 px |
| 1920 px | 1920 px | 1920 px |
Decimal heights are displayed to four decimal places. Rounding can change the final ratio slightly. For an exact integer result, use dimensions that are whole-number multiples of 1:1.