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:blue;"> <div style="width:50%; margin-left:20%; background-color:lime;"> 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%</span></p> <p><span style="font-size:200%;">200%</span></p> </div>
The above HTML will output:
Specifications
Specification | Status | Comment |
---|---|---|
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
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support | 1.0 | 1.0 (1.7 or earlier) | (Yes) | (Yes) | 1.0 (85) |
Feature | Android | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |