Aspect Ratio Calculator

Calculate missing dimensions, resize images and videos proportionally, or convert between different aspect ratios.

Original Dimensions

Width

Height

Ratio: 16:9 (1.778)

Target Width

Target Height

Resize Mode: Calculates new dimensions while maintaining the original aspect ratio.

Crop Mode: Calculates how to crop the image to fit a different aspect ratio.

Quick Presets: Click any common aspect ratio to instantly apply it to your dimensions.

Auto-Calculate: Enter just width or height, and the other dimension will be calculated automatically.