Aspect Ratio Calculator
Calculate image aspect ratios and find new dimensions that maintain proportions.
Original Dimensions
Scale to New Size
Common Ratios
Matches These Common Ratios
This calculator helps you work out an image's aspect ratio (like 16:9 or 4:3), or figure out what dimensions to use to match a target ratio - useful when you need to resize an image to fit a specific ratio without distorting it, or just want to know what ratio a set of dimensions represents.
Frequently asked questions
Enter your current dimensions or target ratio, and the calculator works out matching width/height values so you can resize proportionally without stretching the image.
16:9 (widescreen video/YouTube thumbnails), 1:1 (square, social media profile posts), 4:3 (traditional photo/screen), and 9:16 (vertical/story format) are among the most common.
This is a calculator for working out the right dimensions - use the Image Resizer or Crop tool afterward to actually apply those dimensions to your image.