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.

The min-height and max-height properties override height.


/* Keyword value */
height: auto;

/* <length> values */
height: 120px;
height: 10em;

/* <percentage> value */
height: 75%;

/* Global values */
height: inherit;
height: initial;
height: unset;


Defines the height as an absolute value.
Defines the height as a percentage of containing block's height.
If present, the preceding <length> or <percentage> is applied to the element's border box.
If present, the preceding <length> or <percentage> is applied to the element's content box.
The browser will calculate and select a height for the specified element.
Use the fill-available inline size or fill-available block size, as appropriate to the writing mode.
The intrinsic preferred height.
The intrinsic minimum height.
The containing block height minus vertical margin, border and padding.
The larger of:
  • the intrinsic minimum height
  • the smaller of the intrinsic preferred height and the available height

Formal syntax

[ <length> | <percentage> ] && [ border-box | content-box ]? | available | min-content | max-content | fit-content | auto



<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 {
  width: 250px;
  margin-bottom: 5px;
  border: 2px solid blue;

#taller {
  height: 50px;

#shorter {
  height: 25px;

#parent {
  height: 100px;

#child {
  height: 50%;
  width: 75%;


Accessibility concerns

Ensure that elements set with a height are not truncated and/or do not obscure other content when the page is zoomed to increase text size. 


Specification Status Comment
CSS Basic Box Model
The definition of 'height' in that specification.
Working Draft Added the max-content, min-content, available, fit-content, border-box, content-box keywords.
CSS Transitions
The definition of 'height' in that specification.
Working Draft Lists height as animatable.
CSS Level 2 (Revision 1)
The definition of 'height' in that specification.
Recommendation Adds support for the <length> values and precises on which element it applies to.
CSS Level 1
The definition of 'height' in that specification.
Recommendation Initial definition.
CSS Intrinsic & Extrinsic Sizing Module Level 3
The definition of 'width' in that specification.
Working Draft Adds new sizing keywords for width and height.

Initial valueauto
Applies toall elements but non-replaced inline elements, table columns, and column groups
PercentagesThe 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 valuea percentage or auto or the absolute length
Animation typea length, percentage or calc();
Canonical orderthe unique non-ambiguous order defined by the formal grammar

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support1 Yes1471
fill46 ? ? ? ? ?
fit-content46 ? ? ? ? ?
max-content46 ? ? ? ? ?
min-content46 ? ? ? ? ?
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support11 Yes411 ?
fill4646 ? ? ? ? ?
fit-content4646 ? ? ? ? ?
max-content4646 ? ? ? ? ?
min-content4646 ? ? ? ? ?

See also