About

About Aspect Ratio Calculator

aspectratiocalculator.com is a small, focused tool that does one job well: it tells you the aspect ratio of any width and height, and resizes to a new size without changing the proportions.

Why it exists

Every video editor, designer, photographer, and social media manager runs into the same question several times a week: what size does this need to be so it does not get cropped or stretched? The maths is simple but tedious, and most existing calculators are slow, covered in pop-ups, or missing basic things like dark mode and a mobile layout. This site fixes that.

What it offers

• An aspect ratio calculator that fills in the missing value from any three.
• A reference table of standard ratios and resolutions.
• An image aspect ratio finder that reads files locally.
• Dark mode, keyboard shortcuts, and a layout that works on phones.

How it is built

The site is a set of static pages. There is no server-side processing, no database, and no account system. Calculations happen in your browser with plain JavaScript. It is free to use without limits, and it is supported by non-intrusive advertising once traffic allows.

Contact

Corrections, feature ideas, and bug reports are welcome at hello@aspectratiocalculator.com, or through the contact page.