Resize an image without distorting it

When values need comparing or a one-off calculation needs checking, this helps students, individuals and professionals. Resize an image without distorting it.

Resize an image without distorting it. The result appears instantly in your browser, ready to copy, with no account, upload or storage involved.

How to use

Enter the original width and height of your image in the first two fields.
Type the new width you want in the third field while keeping the same ratio.
Run the calculation with the main button to get the matching height.
Copy the displayed result and use it in your image editor.

Example

With the sample values 1920, 1080 and 800, the tool finds the height that preserves the original width-to-height relationship. Check the result field: it should be proportional to the new width. That is useful when you resize a picture without stretching it.

Input

1920
1080
800

Output

800 x 450

Limits and formats

This tool does not edit the image file; it only returns a calculated dimension for you to reuse.
Use positive numbers and keep the same unit for every value, otherwise the ratio becomes meaningless.
Some editors require whole pixels, so round the height and check the visual result before exporting.

Where processing happens

The whole calculation runs in your browser. The numbers you type stay on your device and are not sent anywhere. You can use it for personal photos or work projects without creating an account.

Frequently asked questions

How do I find the width if I only know the height I want?

This version asks for a new width, so start from a width you know. If your target is a height, divide the target height by the original height, then multiply that factor by the original width to get an equivalent width.

Can I use it for videos, banners or print sizes?

Yes, any two dimensions that must keep a stable proportion can be checked here. The method is the same for a video frame, a web banner or a print format. Just make sure all measurements use the same unit before you compare them.

What should I do when the answer has decimals?

Round to the nearest whole pixel if your editor only accepts integers, then inspect the result. A one-pixel difference is often invisible, but it can matter for icons or fine lines. Adjust the new width slightly until the height looks clean and balanced.