Aspect Ratio Calculator

Find the aspect ratio from any dimensions, calculate missing sides, and scale images while keeping proportions. Click a preset to get started.

Common Presets

1 Dimensions → Ratio

Width (px)

×

Height (px)

2 Ratio + One Side → Missing Side

Ratio W

:

Ratio H

|

Width

×

Height

3 Scale Calculator — Resize While Keeping Proportions

Original Width

Original Height

Target Width

Target Height

Visual Preview

16:9