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    height

    This article is in need of a technical review.

    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%;
    
    height: inherit;
    

    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: wbamberg,
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