What is 1:1?
A 1:1 aspect ratio means that the width and the height are equal, so the picture is a square. 512 x 512 and 1080 x 1080 pixels are both 1:1. The decimal ratio is 1.00:1, and a square looks the same when you turn it on its side.
How to calculate a 1:1 size
height = width
width = heightType either side above and the other becomes the same number. With a square, there is nothing to round, so any whole number works.
Common square sizes
| Size | Typical use |
|---|---|
| 180 x 180 | Apple touch icon |
| 512 x 512 | App icons and profile pictures |
| 1080 x 1080 | Square social media posts |
| 1200 x 1200 | Product and listing images |
| 2048 x 2048 | Large product images that can be zoomed |
Sites and marketplaces set their own minimum and recommended sizes, so check the one you use.
Make your own picture square
Enter the size of your picture in Make my picture 1:1. You get two choices:
- Crop. The largest square inside your picture, and how many pixels are removed from the longer side. A 4000 x 3000 picture gives a 3000 x 3000 square, and 1000 pixels are cut away.
- Add bars. The smallest square that holds the whole picture. The same picture sits in a 4000 x 4000 square, with bars of 500 pixels at the top and bottom.
Crop with the 1:1 image cropper, or use crop to square, which can also add a background colour.
Related calculators
See the aspect ratio calculator, 16:9 and 4:3, the width and height calculator and the aspect ratio guide.