The min-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.

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

Syntax

/* <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;

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 (Both CSS3 Box and CSS3 Writing Modes drafts used to define these keywords, but are superseded by this spec.)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.

Initial valueauto
Applies toall elements but non-replaced inline elements, table columns, and column groups
Inheritedno
PercentagesThe 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.
Mediavisual
Computed valuethe percentage as specified or the absolute length
Animation typea length, percentage or calc();
Canonical orderthe unique non-ambiguous order defined by the formal grammar

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic supportChrome Full support 1Edge Full support 12Firefox Full support 3
Notes
Full support 3
Notes
Notes CSS 2.1 leaves the behavior of min-height with table undefined. Firefox supports applying min-height to table elements.
IE Full support 7
Notes
Full support 7
Notes
Notes 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.
Opera Full support 4
Notes
Full support 4
Notes
Notes CSS 2.1 leaves the behavior of min-height with table undefined. Opera supports applying min-height to table elements.
Safari Full support 1WebView Android ? Chrome Android ? Edge Mobile Full support YesFirefox Android ? Opera Android ? Safari iOS Full support 9Samsung Internet Android ?
fit-content, max-content, and min-content
Experimental
Chrome No support NoEdge No support NoFirefox No support NoIE No support NoOpera No support NoSafari Full support 9WebView Android ? Chrome Android ? Edge Mobile ? Firefox Android ? Opera Android ? Safari iOS ? Samsung Internet Android No support No
fill-available
Experimental
Chrome Full support 1Edge No support NoFirefox No support NoIE No support NoOpera Full support YesSafari Full support 9WebView Android Full support YesChrome Android Full support YesEdge Mobile ? Firefox Android ? Opera Android Full support YesSafari iOS ? Samsung Internet Android Full support Yes
autoChrome Full support 21Edge ? Firefox No support 16 — 22
Notes
No support 16 — 22
Notes
Notes Firefox 18 and later used auto as the initial value for min-height.
IE No support NoOpera Full support 12.1Safari No support NoWebView Android ? Chrome Android ? Edge Mobile ? Firefox Android ? Opera Android ? Safari iOS ? Samsung Internet Android ?

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.
See implementation notes.
See implementation notes.

See also