Aspect Ratio Calculator
Scale dimensions while keeping the aspect ratio, or identify a ratio.
Input
Settings
Run
Results
Results will appear here once you run the tool.
About Aspect Ratio Calculator
Scale dimensions while keeping the aspect ratio, or identify a ratio. Aspect Ratio Calculator needs no input file — choose your settings and it generates the result straight away.
Your files stay on your device. ZyncTools has no upload step: the file is read in your browser, processed there, and handed straight back to you. There is no account, no watermark and no size cap beyond what your own device can hold.
Settings. Aspect Ratio Calculator gives you control over mode, original width, original height, set the new, new width, new height, box width and box height, plus 1 more.
Also known as: aspect ratio, resize, dimensions, 16:9, proportion, scale.
How to use Aspect Ratio Calculator
- Open the tool. Open Aspect Ratio Calculator. There is nothing to upload — it works from the settings alone.
- Choose your settings. Adjust mode, original width, original height and the other 6 settings to suit what you need.
- Generate. Press Generate. The result appears immediately and updates whenever you change a setting.
- Save the result. Copy the output, or press Download to save it. Nothing is kept once you close the tab.
Frequently asked questions
Are my files uploaded when I use Aspect Ratio Calculator?
No. Aspect Ratio Calculator runs entirely inside your browser. Your file is read locally, processed on your own device, and handed straight back to you. You can confirm this yourself: open your browser's developer tools, watch the Network tab, and run the tool — no request carries your data anywhere.
Is Aspect Ratio Calculator free?
Yes, completely. No account, no sign-up, no watermark on your output, and no cap on how many times you can use it. The project is open source under the AGPL licence.
Does Aspect Ratio Calculator work offline?
Mostly. The site caches itself after your first visit, so it keeps working without a connection. Tools that need a specialised library — PDF editing, OCR, QR codes, MP3 encoding — need a connection the first time you run them, then that library is cached too.