Source: https://restorebunny.com/tools/aspect-ratio-calculator/

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# Aspect Ratio Calculator

Enter image width and height, find the simplest aspect ratio, and calculate a new height for your chosen width. No photo upload needed.

Free · No signupLocal browser processing

Original width (px)Original height (px)New width (px)

**Result**Ready for your input

Your result will appear here

No signup or server upload.

This calculates geometry. It does not resize a file, assess sharpness or recommend a device-specific image size.

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## How to use aspect ratio calculator

1. Enter the values for your calculation.
2. Adjust the controls and inspect the result.
3. Download the calculation as text or revise your inputs.

## A practical example

1920 × 1080 reduces to 16:9. At the same ratio, a width of 1200 pixels gives a height of 675 pixels.

## Frequently asked questions

Is aspect ratio calculator free to use?

Yes. This utility works without a signup or paid credit. Files and calculations are processed in this browser.

What should I check before using the result?

This calculates geometry. It does not resize a file, assess sharpness or recommend a device-specific image size.

## Keep working on your photo

- [Browse all free tools](<https://restorebunny.com/tools/>)
- [Check photo resolution](<https://restorebunny.com/tools/photo-resolution-checker/>)

[Browse all free tools](<https://restorebunny.com/tools/>)

By RestoreBunny · Reviewed 2026-10-16. Utilities use local calculations or [browser image processing](<https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API/Tutorial/Pixel_manipulation_with_canvas>). The download button identifies the output format. Animated images export one decoded frame. Keep your original files.