About Aspect Ratios
This project was created as an ultra-fast, offline-capable tool to assist designers, video editors, and developers in working with digital screen proportions.
The Math Behind Proportions
An aspect ratio represents the ratio between the width and the height of an image or screen. It is usually expressed as width:height (e.g. 16:9).
To calculate it, we divide both width and height by their Greatest Common Divisor (GCD). The mathematical equation is:
Aspect Ratio = (Width / GCD(Width, Height)) : (Height / GCD(Width, Height))
Why Use This Calculator?
- Pixel-Perfect Scaling: Calculate matching heights or widths instantly when resizing elements.
- Visual Comparison: Overlay your dimensions on common device outlines (e.g., standard smartphone screens, cinematic displays) to see cropping impact.
- Strict Privacy: All code runs in your local browser sandbox. No server tracking or database logs.