Aspect Ratio Calculator
Use this free aspect ratio calculator to calculate matching image or video dimensions while preserving an aspect ratio. The tool runs directly in your browser and does not require an account or paid API.
How to use the Aspect Ratio Calculator
- Enter or paste the text, values or dimensions requested by the tool.
- Choose the processing or calculation options you need.
- Review the result immediately.
- Copy the result or adjust the inputs to compare another scenario.
Examples
How it works
New height = new width × original height ÷ original width.
Example
A 1920 × 1080 image resized to 1280 pixels wide becomes 1280 × 720 at the same 16:9 ratio.
Frequently asked questions
Is this aspect ratio calculator free?
Yes. It is free to use with no account or paid API required.
Does the tool upload my text?
Normal processing for this tool runs locally in your browser and does not require uploading the entered text to QuickToolCenter.
Can I use it on a phone?
Yes. The tool is designed to work on modern desktop and mobile browsers.
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