Aspect Ratio Calculator

Aspect Ratio Calculator is the go-to utility for designers, video editors, photographers, and content creators who work with specific dimensions daily. Enter any width and height to get the simplified aspect ratio instantly — whether it's 1920×1080 or a custom canvas size, the app reduces it to its cleanest form like 16:9.

Need to work the other way? Input a standard ratio such as 4:3 or 21:9, provide one known dimension, and the app calculates the missing side with precision. This is perfect for resizing images, planning video projects, or setting up artboards without math errors.

The app includes a comprehensive reference library of common aspect ratios — 16:9, 9:16, 1:1, 4:3, 3:2, 21:9, 4:5, and 2:1 — each with real-world use cases and standard resolutions. Visual previews help you instantly grasp the shape of each ratio before you commit to a layout.

Everything runs entirely on-device with no internet connection, no ads, and no permissions required. It is pure, fast, and reliable — exactly what you need when you are in the middle of a creative workflow and need a quick answer..