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min-height

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

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

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

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

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

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

Initial value	`0`
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 `0`.
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 height, expressed as a <length>. Negative values make the declaration invalid.
<percentage>: The minimum height, expressed as a <percentage> of the containing block's height. Negative values make the declaration invalid.

Keyword values

auto: The default minimum height for flex items, providing a more reasonable default than 0 for other layouts.

max-content: The intrinsic preferred height.
min-content: The intrinsic minimum height.
fill-available: The containing block's height minus the vertical margin, border, and padding. (Note that some browsers implement an ancient name for this keyword, available.)
fit-content: According to CSS3 Box, this is a synonym of min-content. CSS3 Sizing defines a more complex algorithm, but no browser implements it, even in an experimental way.

Formal syntax

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

Examples

table { min-height: 75%; }

form { min-height: 0; }

Specifications

Specification	Status	Comment
CSS Intrinsic & Extrinsic Sizing Module Level 3 The definition of 'min-height' 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-height' in that specification.	Candidate Recommendation	Adds the `auto` keyword and uses it as the initial value.
CSS Transitions The definition of 'min-height' in that specification.	Working Draft	Defines `min-height` as animatable.
CSS Level 2 (Revision 1) The definition of 'min-height' in that specification.	Recommendation	Initial definition.

Browser compatibility

Feature	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	1	Yes	3¹	7²	4³	1
`fit-content`, `max-content`, and `min-content`	No	No	No	No	No	9
`fill-available`	No	No	No	No	No	9
`auto`	21	?	16 — 22⁴	No	12.1	No

Feature	Android webview	Chrome for Android	Edge mobile	Firefox for Android	Opera Android	iOS Safari	Samsung Internet
Basic support	?	?	Yes	?	?	9	?
`fit-content`, `max-content`, and `min-content`	?	?	?	?	?	?	?
`fill-available`	?	?	?	?	?	?	?
`auto`	?	?	?	?	?	?	?

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

2. In Internet Explorer 10 and 11, a min-height declaration on a column-direction flex container doesn't apply to the container's flex items. See Flexbug #3 for more info.

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

4. Firefox 18 and later used auto as the initial value for min-height.