Aspect Ratio Calculator

Calculate ratios from dimensions or dimensions from ratios.

Dimensions to Ratio

Width: Height:

Enter dimensions above

Common Presets

Ratio to Dimension

Ratio: :

Known width: OR Known height:

Enter a ratio and one dimension above.

How to Use

Enter width and height to calculate the aspect ratio.
Click a preset to fill in common resolutions.
Enter a ratio (like 16:9) and one dimension (width or height) to calculate the other.