height
The height
CSS property specifies the height of an element. By default, the property defines the height of the content area. If box-sizing
is set to border-box
, however, it instead determines the height of the border area.
Try it
The min-height
and max-height
properties override height
.
Syntax
css
/* <length> values */
height: 120px;
height: 10em;
height: 100vh;
/* <percentage> value */
height: 75%;
/* Keyword values */
height: max-content;
height: min-content;
height: fit-content(20em);
height: auto;
/* Global values */
height: inherit;
height: initial;
height: revert;
height: revert-layer;
height: unset;
Values
<length>
-
Defines the height as a distance value.
<percentage>
-
Defines the height as a percentage of the containing block's height.
auto
-
The browser will calculate and select a height for the specified element.
max-content
-
The intrinsic preferred height.
min-content
-
The intrinsic minimum height.
fit-content
-
Box will use the available space, but never more than
max-content
fit-content(
<length-percentage>
)-
Uses the fit-content formula with the available space replaced by the specified argument, i.e.
min(max-content, max(min-content, <length-percentage>))
clamp()
-
Enables selecting a middle value within a range of values between a defined minimum and maximum
Accessibility concerns
Ensure that elements set with a height
aren't truncated and/or don't obscure other content when the page is zoomed to increase text size.
Formal definition
Initial value | auto |
---|---|
Applies to | all elements but non-replaced inline elements, table columns, and column groups |
Inherited | no |
Percentages | The percentage is calculated with respect to the height of the generated box's containing block. If the height of the containing block is not specified explicitly (i.e., it depends on content height), and this element is not absolutely positioned, the value computes to auto . A percentage height on the root element is relative to the initial containing block. |
Computed value | a percentage or auto or the absolute length |
Animation type | a length, percentage or calc(); |
Formal syntax
height =
auto |
<length-percentage [0,∞]> |
min-content |
max-content |
fit-content( <length-percentage [0,∞]> )
<length-percentage> =
<length> |
<percentage>
Examples
Setting height using pixels and percentages
HTML
html
<div id="taller">I'm 50 pixels tall.</div>
<div id="shorter">I'm 25 pixels tall.</div>
<div id="parent">
<div id="child">I'm half the height of my parent.</div>
</div>
CSS
css
div {
width: 250px;
margin-bottom: 5px;
border: 2px solid blue;
}
#taller {
height: 50px;
}
#shorter {
height: 25px;
}
#parent {
height: 100px;
}
#child {
height: 50%;
width: 75%;
}
Result
Specifications
Specification |
---|
CSS Box Sizing Module Level 3 # preferred-size-properties |
Browser compatibility
BCD tables only load in the browser
See also
- The box model
width
box-sizing
min-height
,max-height
- The mapped logical properties:
block-size
,inline-size