Aspect Ratio Calculator

About Aspect Ratios

Aspect ratio is the proportional relationship between the width and height of an image or display. It's expressed as two numbers separated by a colon (e.g., 16:9), representing the ratio of width to height. Understanding aspect ratios is essential for responsive web design, video production, photography, and UI/UX design.

Common aspect ratios include 16:9 (widescreen displays), 4:3 (traditional displays), 21:9 (ultrawide), and 1:1 (square). Our calculator supports both forward calculation (width and height to ratio) and reverse calculation (width and ratio to height), making it easy to determine the correct dimensions for your design requirements.

The tool uses the Greatest Common Divisor (GCD) algorithm to simplify ratios to their lowest terms, ensuring you get the most accurate representation. This is particularly useful when working with non-standard dimensions or when you need to maintain consistent aspect ratios across different screen sizes and devices.