Aspect Ratio Calculator

How to find and keep an aspect ratio

1. Enter a width and height to see their ratio, such as 16:9.
2. Enter a new width to get the matching height.
3. Or enter a new height to get the matching width.

Frequently asked questions

What are common aspect ratios?

16:9 for most screens and video, 4:3 for older screens and many tablets, 1:1 for square posts, and 9:16 for vertical video.

How do I keep the same ratio when resizing?

New height = new width × original height / original width. 1920 × 1080 scaled to 1280 wide is 720 high.

Is 16:9 the same as 1.78:1?

Yes. 16 / 9 = 1.78. Film ratios such as 2.39:1 are written the same way.