Aspect Ratio Calculator
Scale size, keep ratio.
Enter the values and press Calculate.
How to use Aspect Ratio Calculator
Resizing keeps proportions when you scale by the same factor. This tool finds the new height and the ratio.
Open Aspect Ratio Calculator on toolpermarket and enter your values above.
Enter the original width, height, and the new width in the fields above, then press Calculate.
Read the result below the form. You can change any input and press Calculate again to compare scenarios.
Worked example. A 1920 by 1080 image at 1280 wide stays 720 tall, a 16 to 9 ratio.
When to use Aspect Ratio Calculator. Use it to resize images, videos, or layouts without distortion.
When you actually reach for this
- Use it to resize images, videos, or layouts without distortion.
Where this tool stops being accurate
- Converts exactly using standard factors; some apparel and regional sizes are approximate and vary by brand.
- It does not round to a nearest real product size unless the tool says so.
Frequently asked questions
Does it keep the shape?
Yes. It scales height by the same factor as width, preserving the original ratio.
What ratio does it show?
It reduces the width and height to their simplest whole-number ratio, like 16 to 9.
Why does my shoe size not match?
Clothing and shoe sizes are brand- and region-specific approximations; the converter gives the standard mapping, but always check the retailer’s own chart.