Question 1

What is aspect ratio?

Accepted Answer

Aspect ratio is the proportional relationship between the width and height of an image, video, or screen. It is expressed as W:H (e.g. 16:9 or 4:3). Maintaining aspect ratio when resizing prevents distortion.

Question 2

What is the 16:9 aspect ratio used for?

Accepted Answer

16:9 is the standard widescreen aspect ratio used by HD and 4K TVs, YouTube, Netflix, most laptops, and monitors. Common resolutions are 1920×1080, 1280×720, and 3840×2160.

Question 3

How do I maintain aspect ratio when resizing?

Accepted Answer

Enter the original width and height, then enter either the new width or the new height. Click Calculate to get the other dimension scaled proportionally.

Question 4

What aspect ratio should I use for Instagram?

Accepted Answer

Instagram supports 1:1 (square) for posts, 4:5 (portrait) for feed images, and 9:16 for Stories and Reels.

Aspect Ratio Calculator