Can I solve for a new width instead?

The tool calculates height from width. For the reverse, swap the width and height values.

This tool processes your input in your browser, and Alona Tool does not store it on a server. See the Privacy Policy for details on browser storage and third-party services used elsewhere on the site.

Aspect Ratio Calculator

Runs in Your Browser

Find the simplified aspect ratio of a width and height, and the new height for a different width.

Browser-based: this tool works on your device and does not send your input to an Alona Tool server. See the Privacy Policy for details.

Fast Processing

Loading Aspect Ratio Calculator… This tool is an interactive page and needs JavaScript enabled in your browser.

Example Usage & Test Cases

Resize a video frame

Input Scenario:

1920 × 1080, new width 1280

Generated Result:

Ratio 16:9, new height 720, decimal ratio 1.7778

How It Works

Enter the original width and height.

Enter the new width you need.

Read the ratio and the matching new height.

Frequently Asked Questions

Some widths do not divide evenly; round to the nearest whole pixel for images and video.

Good to Know

Common uses

Resizing images and video without stretching
Checking a screen or thumbnail ratio

Limitations and notes

Calculates height from a new width only.
Rounding is up to you for pixel dimensions.

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