Summary

The height CSS property specifies the height of the content area of an element. The content area is inside the padding, border, and margin of the element.

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

  • 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.
  • Media visual
  • Computed value a percentage or auto or the absolute length
  • Animatable yes, as a length, percentage or calc(); when both values are lengths, they are interpolated as lengths; when both values are percentages, they are interpolated as percentages; otherwise, both values are converted into a calc() function that is the sum of a length and a percentage (each possibly zero), and these calc() functions have each half interpolated as real numbers.
  • Canonical order the unique non-ambiguous order defined by the formal grammar

Syntax

height: auto;

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

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

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

Values

<length>
See <length> for possible units.
<percentage>
Specified as a <percentage> of containing block's height.
border-box 
If present, the preceding <length> or <percentage> is applied to the element's border box.
content-box 
If present, the preceding <length> or <percentage> is applied to the element's content box.
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.
available 
The containing block height minus vertical margin, border and padding.
fit-content 
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 | complex | auto

Example

HTML

<div id="red">
  <span>I'm 50 pixels tall.</span>
</div>
<div id="green">
  <span>I'm 25 pixels tall.</span>
</div>
<div id="parent">
  <div id="child">
    <span>I'm half the height of my parent.</span>
  </div>
</div>

CSS

div {
  width: 250px;
  margin-bottom: 5px;
  border: 3px solid #999999;
}

#red {
  height: 50px;
}

#green {
  height: 25px;
}

#parent {
  height: 100px;
}

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

Specifications

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 specification.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 1.0 1.0 (1.7 or earlier) 4.0 7.0 1.0
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support 1.0 1.0 (1) 6.0 6.0 1.0

See also

Document Tags and Contributors

Last updated by: Manojkr,
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