The <ratio>
CSS data type, used for describing aspect ratios in media queries, denotes the proportion between two unitless values.
<ratio>
Syntax
In Media Queries Level 3, the <ratio>
data type consisted of a strictly positive <integer>
followed by a forward slash ('/', Unicode U+002F SOLIDUS
) and a second strictly positive <integer>
. Spaces before and after the slash are optional. The first number represents the width, while the second represents the height.
In Media Queries Level 4, the <ratio> date type is updated to consist of a strictly positive <number>
followed by a forward slash ('/', Unicode U+002F SOLIDUS
) and a second strictly positive <number>
. In addition a single <number>
as a value is allowable.
Examples
Use in a media query
@media screen and (min-aspect-ratio: 16/9) { ... }
Common aspect ratios
Ratio | Usage | |
---|---|---|
4/3 |
Traditional TV format in the twentieth century. | |
16/9 |
Modern "widescreen" TV format. | |
185/100 = 91/50 |
The most common movie format since the 1960s. | |
239/100 |
"Widescreen," anamorphic movie format. |
Specifications
Specification |
---|
Media Queries Level 4 # values |
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
ratio |
3
|
12
|
3.5
|
9
|
9.5
|
5
|
≤37
|
18
|
4
|
14
|
4.2
|
1.0
|
number_value |
No
|
No
|
70
|
No
|
No
|
No
|
No
|
No
|
No
|
No
|
No
|
No
|
See also
-
aspect-ratio
media feature
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https://developer.mozilla.org/en-US/docs/Web/CSS/ratio