How do I resize an image without stretching it?
Keep the original width-to-height ratio. Enter the original dimensions and one desired dimension; the calculator supplies the other one.
Aspect Ratio Calculator — No Signup Needed
Resize dimensions without stretching the picture. It works directly in this browser, with no account and nothing to install.
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Private by design: this tool works on your device. Your information is not uploaded.
How to use this aspect ratio calculator
- Enter the original width and height to establish the aspect ratio.
- Enter the new width or height you need.
- Use the matching dimension shown by the calculator when resizing your image or video.
Common questions
What does a 16:9 aspect ratio mean?
It means the image is 16 units wide for every 9 units high. Examples include 1920×1080 and 1280×720.
Does this calculator change my image file?
No. It only calculates dimensions. Use the image resizer to create the resized file.