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min-width

The min-width CSS property sets the minimum width of an element. It prevents the used value of the width property from becoming smaller than the value specified for min-width.

/* <length> value */
min-width: 3.5em;

/* <percentage> value */
min-width: 10%;

/* Keyword values */
min-width: max-content;
min-width: min-content;
min-width: fit-content;
min-width: fill-available;

/* Global values */
min-width: inherit;
min-width: initial;
min-width: unset;

The element's width is set to the value of min-width whenever min-width is larger than max-width or width.

Initial value	`0`
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
Animation type	a length, percentage or calc();
Canonical order	the unique non-ambiguous order defined by the formal grammar

Syntax

Values

<length>: The minimum width, expressed as a <length>. Negative values make the declaration invalid.
<percentage>: The minimum width, expressed as a <percentage> of the containing block's width. Negative values make the declaration invalid.

Keyword values

auto: The default minimum width for flex items, providing a more reasonable default than 0 for other layouts.
max-content: The intrinsic preferred width.
min-content: The intrinsic minimum width.
fill-available: The containing block's width minus the horizontal margin, border, and padding. (Note that some browsers implement an ancient name for this keyword, available.)
fit-content: Defined as min(max-content, max(min-content, fill-available)).

Formal syntax

<length> | <percentage> | auto | max-content | min-content | fit-content | fill-available

Examples

table { min-width: 75%; }

form { min-width: 0; }

Specifications

Specification	Status	Comment
CSS Intrinsic & Extrinsic Sizing Module Level 3 The definition of 'min-width' in that specification.	Working Draft	Adds the `max-content`, `min-content`, `fit-content`, and `fill-available` keywords. (Both CSS3 Box and CSS3 Writing Modes drafts used to define these keywords, but are superseded by this spec.)
CSS Flexible Box Layout Module The definition of 'min-width' in that specification.	Candidate Recommendation	Adds the `auto` keyword and uses it as the initial value.
CSS Transitions The definition of 'min-width' in that specification.	Working Draft	Defines `min-width` as animatable.
CSS Level 2 (Revision 1) The definition of 'min-width' in that specification.	Recommendation	Initial definition.

Browser compatibility

Feature	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	1	Yes	1¹	7	4²	2
`fit-content`, `max-content`, and `min-content`	24 -webkit-	No	3 -moz- ³	No	No	No
`fill-available`	24 -webkit-	No	No	No	No	No
`auto`	21⁴	Yes⁵	34 16 — 22⁶	No	12.1⁷	No

Feature	Android webview	Chrome for Android	Edge mobile	Firefox for Android	Opera Android	iOS Safari	Samsung Internet
Basic support	?	?	Yes	?	?	?	?
`fit-content`, `max-content`, and `min-content`	?	?	No	?	?	?	?
`fill-available`	?	?	No	?	?	?	?
`auto`	?	?	?	?	?	?	?

1. CSS 2.1 leaves the behavior of min-width with table undefined. Firefox supports applying min-width to table elements.

2. CSS 2.1 leaves the behavior of min-width with table undefined. Opera supports applying min-width to table elements.

3. Firefox implements the definitions given in CSS3 Basic Box. This defines available and not fit-available. Also, the definition of fit-content is simpler than in CSS3 Sizing.

4. Chrome uses auto as the initial value for min-width.

5. Edge uses auto as the initial value for min-width.

6. Firefox 18 and later (until the value was removed), used auto as the initial value for min-width.

7. Opera uses auto as the initial value for min-width.