Find the perfect dimensions for social media, print, and video. Calculate aspect ratios instantly.
Photo Aspect Ratio Guide is a free, browser-based tool designed for developers, designers, writers, and everyday users. Calculate and convert between photo and video aspect ratios. Enter width or height and auto-calculate the other dimension. Free online aspect ratio calculator and resizer. Everything runs locally in your browser using JavaScript — no data is ever sent to a server, making it completely private and secure. The tool is designed to be intuitive and beginner-friendly while still offering advanced features for power users. It loads instantly with no installation required and works offline once loaded. Use it as often as you need — there are no daily limits, no watermarks, and no hidden fees.
Yes! Photo Aspect Ratio Guide is completely free with no signup required. It runs entirely in your browser — your data never leaves your device.
Enter your data in the input fields above. Results are generated instantly in your browser. You can copy, download, or share the output.
Absolutely. Photo Aspect Ratio Guide runs 100% client-side in your browser using JavaScript. No data is uploaded, stored, or shared with any server. Your privacy is guaranteed.