Common Aspect Ratios and Where to Use Them

An aspect ratio is a shape, not a size. A 1:1 image can be 600 by 600 pixels or 3000 by 3000; both are squares. Knowing the common ratios makes it easier to choose a crop before you open an editor, and harder to be surprised when a platform trims the edges of a photo.

The Aspect Ratio tool converts an image to a fixed or custom ratio by cropping the overflow or adding padding. This guide covers the ratios you are most likely to need and what each one suits.

Square and portrait: 1:1, 4:5, 3:4

1:1 is the most portable shape. It suits profile pictures, product grids, album covers, and feed posts that need to survive a square crop. Its weakness is that it discards the sides of a landscape scene, so a group photo may lose the people at the edges.

4:5 is a gentle portrait ratio that fills more of a phone screen than a square. 3:4 is slightly taller and appears in classic portrait prints, some camera modes, and older displays. Both are useful for people and products, but keep faces away from the top and bottom edges.

Landscape: 3:2, 4:3, 16:9

3:2 comes from 35mm film and remains common in cameras; it also matches a 6 by 4 inch print. 4:3 was the standard for older televisions and many digital cameras, and it remains a common default for phone photos. It is slightly squarer than 3:2, so it loses less height when cropping a tall subject.

16:9 is the shape of most widescreen video, presentations, and modern displays. It is good for landscapes and scenes with horizontal movement, but a portrait cropped to 16:9 can end up with a lot of empty space at the sides. Choose it when the destination is a screen or a video frame, not a print.

Vertical and ultrawide: 9:16, 21:9

9:16 is 16:9 turned upright. It suits phone screens, stories, reels, and vertical video. Because the frame is tall, the subject usually needs to be centred and the important detail kept in the middle band, away from the interface elements at the top and bottom.

Other ratios you may meet

2:3 is the portrait version of 3:2 and is common for posters and photo prints. 5:4 is a slightly squat landscape shape found in some large prints and older monitors. Link previews often use a wide ratio around 1.91:1. These are less common than the shapes above, but they appear often enough to recognise.

Start from the destination: a screen, a print, a form, or a feed. That tells you the ratio, and the ratio tells you whether cropping or padding is the kinder choice. Open Aspect Ratio, choose a preset or enter a custom width and height, and check the preview before exporting. The conversion runs in your browser; check for private details before sharing the converted image. For the underlying difference between the two operations, read Crop or Resize? How Aspect Ratio Changes a Photo. If a form has given you an exact pixel size, see How to Crop an Image to an Exact Size for a Form.