Calculate and scale aspect ratios for images and video.
Small technical details can decide how a page behaves in search and on the web. Use Aspect Ratio Calculator to work with width, height, original width, and original height and produce ready-to-use output you can copy into your site.
An aspect ratio is the proportion of width to height, such as 16:9. Keeping it consistent stops pictures looking stretched when resized.
New height = New width × (Original height ÷ Original width). A 1920 × 1080 image scaled to 1280 wide becomes 1280 × 720.
If a platform needs a different ratio, crop rather than stretch, and keep the subject inside a safe central area.
Calculate and scale aspect ratios for images and video. Aspect Ratio Calculator produces output that is ready to paste into a page or settings screen, helps you check details that are easy to miss by eye, and saves a trip to separate developer or webmaster software.
You are setting up a new page and use Aspect Ratio Calculator instead of writing the output by hand.
After you place the output on your site, test the live page once to confirm everything works as intended. Search engines decide how pages are shown, so treat the output as a helpful input rather than a guarantee.
This page is meant for anyone looking up “image aspect ratio”, “16:9 calculator”, “resize with aspect ratio”, “image ratio calculator”, and “video aspect ratio”. Whatever the exact wording, the need is usually the same: a quick, reliable result without extra software.
It is a SEO and webmaster tool that takes your input on this page and gives you ready-to-use output you can copy into your site.
You will work with width, height, original width, and original height.
Yes, if you want a quick answer without installing anything. Searches like this usually come from someone with exactly that need, and the fields on this page are built for it.
It can be. Check the fields on this page and the result it gives; if they match what you are trying to do, you are in the right place.
No. This tool runs inside your browser, so what you type or select is not sent to our server for processing.
Yes. The page adapts to phone, tablet and computer screens, so you can use it wherever is convenient.
More utilities for webmasters: Image Resizer, Screen Resolution Checker, and Image Compressor.
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Compress images to reduce file size for web.
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