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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.

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

Syntax

/* Keyword value */
height: auto;

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

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

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

Values

<length>
Defines the height as an absolute 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(<length-percentage>)
Uses the fit-content formula with the available space replaced by the specified argument, i.e. min(max-content, max(min-content, )).

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.

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

auto | <length> | <percentage> | min-content | max-content | fit-content(<length-percentage>)

where
<length-percentage> = <length> | <percentage>

Examples

Setting height using pixels and percentages

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

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 Status Comment
CSS Box Sizing Module Level 4
The definition of 'height' in that specification.
Editor's Draft
CSS Box Sizing Module Level 3
The definition of 'height' in that specification.
Working Draft Added the max-content, min-content, fit-content keywords.
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.

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
height 1 12 1 4 7 1
fit-content 46 79 No No 33 11
11
9
Prefixed
Prefixed Implemented with the vendor prefix: -webkit-
max-content 46 79 66
66
3
Prefixed
Prefixed Implemented with the vendor prefix: -moz-
No 44 11
min-content 46 79 66
66
3
Prefixed
Prefixed Implemented with the vendor prefix: -moz-
No 44 11
stretch 28
28
Uses the non-standard name: -webkit-fill-available
79
79
Uses the non-standard name: -webkit-fill-available
No No 15
15
Uses the non-standard name: -webkit-fill-available
9
9
Uses the non-standard name: -webkit-fill-available
Mobile
Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
height 1 18 4 10.1 1 1.0
fit-content 46 46 No 33 11
11
9
Prefixed
Prefixed Implemented with the vendor prefix: -webkit-
5.0
max-content 46 46 66
66
4
Prefixed
Prefixed Implemented with the vendor prefix: -moz-
43 11 5.0
min-content 46 46 66
66
4
Prefixed
Prefixed Implemented with the vendor prefix: -moz-
43 11 5.0
stretch 4.4
4.4
Uses the non-standard name: -webkit-fill-available
28
28
Uses the non-standard name: -webkit-fill-available
No 15
15
Uses the non-standard name: -webkit-fill-available
9
9
Uses the non-standard name: -webkit-fill-available
5.0
5.0
Uses the non-standard name: -webkit-fill-available

See also

© 2005–2020 Mozilla and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/CSS/height