The <percentage>
CSS data type represents a percentage value. It is often used to define a size as relative to an element's parent object. Numerous properties can use percentages, such as width
, height
, margin
, padding
, and font-size
.
<length>
value) will be accessible on the inherited property, not the percentage value.Syntax
The <percentage>
data type consists of a <number>
followed by the percentage sign (%
). Optionally, it may be preceded by a single +
or -
sign, although negative values are not valid for all properties. As with all CSS dimensions, there is no space between the symbol and the number.
Interpolation
When animated, values of the <percentage>
data type are interpolated as real, floating-point numbers. The speed of the interpolation is determined by the timing function associated with the animation.
Examples
Width and margin-left
<div style="background-color:navy;"> <div style="width:50%; margin-left:20%; background-color:chartreuse;"> Width: 50%, Left margin: 20% </div> <div style="width:30%; margin-left:60%; background-color:pink;"> Width: 30%, Left margin: 60% </div> </div>
The above HTML will output:
Font-size
<div style="font-size:18px;"> <p>Full-size text (18px)</p> <p><span style="font-size:50%;">50% (9px)</span></p> <p><span style="font-size:200%;">200% (36px)</span></p> </div>
The above HTML will output:
Specifications
Specification | Status | Comment |
---|---|---|
CSS Values and Units Module Level 4 The definition of '<percentage>' in that specification. |
Editor's Draft | No significant change. |
CSS Values and Units Module Level 3 The definition of '<percentage>' in that specification. |
Candidate Recommendation | No significant change from CSS Level 2 (Revision 1). |
CSS Level 2 (Revision 1) The definition of '<percentage>' in that specification. |
Recommendation | No change from CSS Level 1. |
CSS Level 1 The definition of '<percentage>' in that specification. |
Recommendation | Initial definition. |
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
<percentage> | Chrome Full support 1 | Edge Full support 12 | Firefox Full support 1 | IE Full support 3 | Opera Full support 3.5 | Safari Full support 1 | WebView Android Full support ≤37 | Chrome Android Full support 18 | Firefox Android Full support 4 | Opera Android Full support 10.1 | Safari iOS Full support 1 | Samsung Internet Android Full support 1.0 |
Legend
- Full support
- Full support