Scale without stretching
Aspect Ratio Calculator
Find an image or screen's simplified aspect ratio and scale one dimension while preserving its proportions.
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How to use it
Three steps. That’s it.
- 1
Enter the original width and height to see the simplified ratio.
- 2
Enter either a new width or a new height.
- 3
Use the calculated matching dimension to preserve proportions.
Good to know
Frequently asked questions
What does 16:9 mean?
For every 16 units of width, the image has 9 units of height. Common examples include 1920 × 1080 and 1280 × 720.
How is a ratio simplified?
Both dimensions are divided by their greatest common divisor. Decimal dimensions are approximated for a practical display ratio.
Does this resize a file?
No. It only calculates dimensions. Use the Image Resizer to create a resized image.
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