Does the aspect ratio calculator upload my dimensions?
No. The calculation runs locally in your browser.
Calculators
Aspect Ratio Calculator
Enter an original width and height, then lock one target dimension to calculate the other without uploading anything.
✓ Tool inputs are processed in your browser✓ No account
Calculate proportional dimensions locally.
When to use this tool
Use it when resizing images, videos, thumbnails or layout frames while keeping the correct proportions.
- Calculate a proportional thumbnail size.
- Scale a video frame without distortion.
- Quickly check a ratio such as 16:9 or 4:3.
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FAQ
Questions
Questions
Can I calculate width from a target height?
Yes. Choose which target dimension to lock and the tool calculates the other dimension.
Does it simplify the ratio?
Yes. It shows the simplified whole-number ratio, such as 16:9.