Aspect Ratio Calculator
Solve any width/height from a target ratio instantly.
Runs 100% in your browser — nothing is ever uploaded.
What is Aspect ratio?
Calculate aspect ratios and missing dimensions: enter width or height and get the other. Common presets included. Free. Pick your options and the result is generated instantly — ready to copy straight into your project. No installation, no account and no upload: the whole process happens client-side in your browser, which keeps your data 100% private.
How to use Aspect ratio
- Open Aspect ratio in your browser — it's free and needs no account.
- Configure the options to match exactly what you need.
- Click the generate button — the result appears instantly.
- Copy the output or download it as a file for your project.
Frequently asked questions
Is Aspect ratio really free?
Yes — Aspect ratio is 100% free with no limits, no watermarks and no registration. You can use it as often as you like, on as many files or inputs as you need.
Is my data safe when I use Aspect ratio?
Absolutely. Aspect ratio runs entirely in your browser using JavaScript — your input is processed on your own device and is never uploaded to any server.
Does Aspect ratio work on mobile devices?
Yes. Aspect ratio works in any modern browser on desktop, tablet and mobile (Chrome, Firefox, Safari, Edge) — there is no app to install.
Are my images uploaded when I make favicons?
No. The favicon generator resizes your image with the canvas API entirely in your browser and packs the results into a ZIP locally. Your artwork never leaves your device.
Is the generated CSS production-ready?
Yes — the gradient generator outputs standard, modern CSS that works in every current browser, ready to paste into your stylesheet.
What favicon sizes do I get?
The full modern set: favicon.ico (16/32/48), PNGs at 16, 32, 180 (Apple touch), 192 and 512 (Android/PWA), plus a ready-made HTML snippet and webmanifest.