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Aspect-ratio calculator
Work out matching image dimensions.
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About Aspect-ratio calculator
Find the aspect ratio of an image or screen from its width and height. Enter a new width to calculate the matching height while keeping the same proportions.
Use the result when preparing an image size or comparing portrait and landscape dimensions.
How to use Aspect-ratio calculator
- Enter Original width and Original height.
- Enter the New width you want to use.
- Select Calculate.
- Copy the ratio and suggested height into your image editor.
Tips and limitations
Use the same unit for the original width and height. The tool rounds those dimensions to whole numbers and returns a whole-pixel height.
It calculates sizes; it does not resize a file. Open the image resizer when you are ready to apply the dimensions.