Aspect Ratio Calculator

Reduce dimensions to a ratio and scale them proportionally.

Your workspace Nothing to install. No signup.

How to use Aspect Ratio Calculator

Enter integer dimensions for a reduced ratio. Set a new width to calculate a proportional height, rounded to the nearest pixel. Scaling up does not restore image detail.

Add your input

Enter your text or values in the workspace above.

Choose your settings

Review the options and limits before processing.

Use your result

Check the output, then save or copy what you need.

Good to know

Does this tool upload my input?

No. This tool processes your input on your device. Its libraries load from this site. Your input is not sent to a processing service.

What should I check before using the result?