Aspect Ratio Calculator

Use this ratio calculator to check the dimensions when resizing images and videos.

Common Presets

Ratio Width

Ratio Height

Pixels Width

Pixels Height

Current Aspect Ratio: 16:9

Simplified Ratio: 16:9

Decimal Ratio: 1.78

Why Aspect Ratio Matters

Every frame, digital video, canvas, responsive design, and image often has a rectangular shape that is exceptionally precise in proportion (or ratio).

The ratio has to be well-defined to make shapes fit into different and distinct mediums, such as computer, movie, television, and camera screens.

Common Aspect Ratio Uses

16:9

Modern HD videos, YouTube, most TVs

4:3

Classic TV, older computer monitors

1:1

Instagram posts, profile pictures

3:2

Traditional photography, DSLR cameras