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    max-height

    Summary

    The max-height CSS property is used to set the maximum height of a given element. It prevents the used value of the height property from becoming larger than the value specified for max-height.

    max-height overrides height, but min-height overrides max-height.

    • Initial value none
    • 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 percentage value is treated as none.
    • Media visual
    • Computed value the percentage as specified or the absolute length or none
    • 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

    Formal syntax: <length> | <percentage> | none | max-content | min-content | fit-content | fill-available
    
    max-height: 3.5em
    max-height: 75%
    max-height: none
    max-height: max-content
    max-height: min-content
    max-height: fit-content
    max-height: fill-available
    
    max-height: inherit
    

    Values

    <length>
    A fixed maximum height. See <length> for possible units.
    <percentage>
    The <percentage> is calculated with respect to the height of the containing block. If the height of the containing block is not specified explicitly, the percentage value is treated as none.
    none
    No limit on the height of the box.
    max-content
    The intrinsic preferred height.
    min-content
    The intrinsic minimum height.
    fill-available
    The containing block height minus horizontal margin, border and padding. Some browsers implement an ancient name for this keyword, available.
    fit-content
    The same as max-content.

    Examples

    table { max-height: 75%; }
    
    form { max-height: none; }
    

    Specifications

    Specification Status Comment
    CSS Intrinsic & Extrinsic Sizing Module Level 3 Working Draft Adds the max-content, min-content, fit-content, and fill-available keywords.
    Both CSS3 Box and CSS3 Writing Modes drafts defined at some point these keywords. These drafts are superseded by this spec.
    CSS Transitions Working Draft Defines max-height as animatable.
    CSS Level 2 (Revision 1) Recommendation Initial definition.

    Browser compatibility

    Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
    Basic support 1.0 1.0 (1.7 or earlier) 7.0 7.0 1.0
    applies to <table> [1] Not supported (Yes) Not supported (Yes) Not supported
    max-content, min-content, and fit-content Not supported [3] 3.0 (1.9)-moz [2] Not supported Not supported Not supported [3]
    fill-available Not supported Not supported bug 527285 Not supported Not supported Not supported
    Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
    Basic support ? ? ? ? ?

    Notes

    [1] CSS 2.1 explicitely leaves the behavior of max-height with <table> undefined. Therefore any behavior is CSS2.1-compliant; newer CSS specifications may define this behavior, so Web developers shouldn't rely on a specific one now.

    [2] Gecko experimentally implements the definitions given in CSS3 Basic Box. This one defines available and not fill-available. Also the definition of fit-content is simpler than in CSS3 Sizing.

    [3] WebKit implements an earlier proposal for setting the height to an intrinsic height: the keywords intrinsic, instead of max-content, and min-intrinsic, instead of min-content There is no equivalent for fill-available or fit-content.

    See also

    The box model, max-width, box-sizing, height, min-height

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