max-width property CSS Reference

Definition and Usage

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

max-width overrides width, but min-width overrides max-width.

  • Initial none
  • Applies to all elements but non-replaced inline elements, table rows, and row groups
  • Inherited no
  • Percentages refer to the width of the containing block
  • 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


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


The width has no maximum value.
See <length> for possible units.
Specified as a <percentage> of containing block's width.
The intrinsic preferred width.
The intrinsic minimum width.
The containing block width minus horizontal margin, border and padding. Some browsers implement an ancient name for this keyword, available.
The same as max-content.


body  { max-width: 40em; }
table { max-width: 75%; }
form  { max-width: none; }
p { background: gold }

Exanple description.

p { background: lightgreen;
max-width:  intrinsic;         /* Safari/WebKit */
max-width:  -moz-max-content;  /* Firefox/Gecko */

Exanple description.

p { background: lightblue;  max-width: -moz-min-content; }

Exanple description.


Desktop browsers

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 1.0 1.0 (1.7 or earlier) 7.0 4.0 2.0.2 (416),
buggy before
applies to <table> Not supported (Yes) Not supported (Yes) Not supported
max-content, min-content, fit-content, and fill-available Not supported 3.0 (1.9)-moz Not supported Not supported Not supported

Mobile browsers

Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support NA NA NA NA NA

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