What is aspect ratio?

Aspect ratio is the proportional relationship between width and height. It's expressed as two numbers separated by a colon, like 16:9 (widescreen) or 4:3 (standard). It describes the shape of a screen, image, or video.

What aspect ratio should I use for YouTube videos?

YouTube recommends 16:9 aspect ratio for standard videos (1920x1080, 1280x720). For Shorts, use 9:16 vertical format (1080x1920). These ratios ensure optimal display without black bars.

How do I calculate dimensions from aspect ratio?

Enter the aspect ratio and one dimension (width or height) in this calculator. It automatically computes the other dimension maintaining the exact ratio.

Aspect Ratio Calculator

Calculate dimensions and aspect ratios for images, videos, and screens

Dimensions

Width:

Height:

16:9

1.778

Preview

1920 × 1080

Aspect Ratio Calculator

Dimensions

Preview

Common Aspect Ratios