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What is aspect ratio?

Aspect ratio is the ratio between the width and height of an image, video or photo. It is commonly expressed as two numbers separated by colons, as in 16:9. In the x:y aspect ratio of the image, video or photo, “x” parts is width and “y” parts is height.

Calculate any aspect ratio simply and easily using our calculator and see below the most common aspect ratios currently used in cinemas, televisions and the internet.

TV & Cinema

Known as standard, this format was used in old TVs

4:3

The widescreen format, used in the vast majority of HDTVs today

16:9

The ultrawide format used in major movie theaters

21:9

Used in IMAX theaters

14:10

Used in IMAX Digital

19:10

Common

aspect ratios

Social Networks & Internet

Twitter image post ratio on mobile with recommended size 1024 x 512 pixels

2:1

This aspect ratio is mostly used for instagram photos

4:5

Is used for instagram story, with recommended size 1080×1920 pixels

9:16

The standard aspect ratio for YouTube video

16:9

The Twitter and Facebook link preview image size recommended

1.91:1

Common

aspect ratios

Photography

The square photo with the same width and height size

1:1

Used in 35mm film, photography and print

3:2

The size used by most digital cameras known as point-and-shoot cameras

4:3

In use for 8×10 digital camera prints

5:4

HD photo cameras, ideal for viewing on widescreen TVs and monitors

16:9

Common

aspect ratios