Web/CSS/grid-auto-rows

The grid-auto-rows CSS property specifies the size of an implicitly-created grid row track or pattern of tracks.

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

If a grid item is positioned into a row that is not explicitly sized by grid-template-rows, implicit grid tracks are created to hold it. This can happen either by explicitly positioning into a row that is out of range, or by the auto-placement algorithm creating additional rows.

Syntax

/* Keyword values */
grid-auto-rows: min-content;
grid-auto-rows: max-content;
grid-auto-rows: auto;

/* <length> values */
grid-auto-rows: 100px;
grid-auto-rows: 20cm;
grid-auto-rows: 50vmax;

/* <percentage> values */
grid-auto-rows: 10%;
grid-auto-rows: 33.3%;

/* <flex> values */
grid-auto-rows: 0.5fr;
grid-auto-rows: 3fr;

/* minmax() values */
grid-auto-rows: minmax(100px, auto);
grid-auto-rows: minmax(max-content, 2fr);
grid-auto-rows: minmax(20%, 80vmax);

/* multiple track-size values */
grid-auto-rows: min-content max-content auto;
grid-auto-rows: 100px 150px 390px;
grid-auto-rows: 10% 33.3%;
grid-auto-rows: 0.5fr 3fr 1fr;
grid-auto-rows: minmax(100px, auto) minmax(max-content, 2fr) minmax(20%, 80vmax);
grid-auto-rows: 100px minmax(100px, auto) 10% 0.5fr fit-content(400px);

/* Global values */
grid-auto-rows: inherit;
grid-auto-rows: initial;
grid-auto-rows: unset;

Values

<length>

Is a non-negative length.

<percentage>

Is a non-negative <percentage> value relative to the block size of the grid container. If the block size of the grid container is indefinite, the percentage value is treated like auto.

<flex>

Is a non-negative dimension with the unit fr specifying the track’s flex factor. Each <flex>-sized track takes a share of the remaining space in proportion to its flex factor.

When appearing outside a minmax() notation, it implies an automatic minimum (i.e. minmax(auto, <flex>)).

max-content

Is a keyword representing the largest maximal content contribution of the grid items occupying the grid track.

min-content

Is a keyword representing the largest minimal content contribution of the grid items occupying the grid track.

minmax(min, max)

Is a functional notation that defines a size range greater than or equal to min and less than or equal to max. If max is smaller than min, then max is ignored and the function is treated as min. As a maximum, a <flex> value sets the track’s flex factor. As a minimum, it is treated as zero (or minimal content, if the grid container is sized under a minimal content constraint).

fit-content( [ <length> | <percentage> ] )

Represents the formula min(max-content, max(auto, argument)), which is calculated similar to auto (i.e. minmax(auto, max-content)), except that the track size is clamped at argument if it is greater than the auto minimum.

auto

Is a keyword that is identical to maximal content if it's a maximum. As a minimum it represents the largest minimum size (as specified by min-width/min-height) of the grid items occupying the grid track.

Note: auto track sizes (and only auto track sizes) can be stretched by the align-content and justify-content properties.

Formal definition

Initial value	`auto`
Applies to	grid containers
Inherited	no
Percentages	refer to corresponding dimension of the content area
Computed value	the percentage as specified or the absolute length
Animation type	discrete

Formal syntax

<track-size>+where <track-size> = <track-breadth> | minmax( <inflexible-breadth> , <track-breadth> ) | fit-content( [ <length> | <percentage> ] )where <track-breadth> = <length-percentage> | <flex> | min-content | max-content | auto<inflexible-breadth> = <length> | <percentage> | min-content | max-content | autowhere <length-percentage> = <length> | <percentage>

Examples

Setting grid row size

HTML

<div id="grid">
  <div id="item1"></div>
  <div id="item2"></div>
  <div id="item3"></div>
</div>

CSS

#grid {
  width: 200px;
  display: grid;
  grid-template-areas: "a a";
  gap: 10px;
  grid-auto-rows: 100px;
}

#grid > div {
  background-color: lime;
}

Result

Specifications

Specification	Status	Comment
CSS Grid LayoutThe definition of 'grid-auto-rows' in that specification.	Candidate Recommendation	Initial definition

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`grid-auto-rows`	Chrome Full support 57 Full support 57 Full support 29 Disabled' Disabled' From version 29: this feature is behind the `Enable experimental Web Platform features` preference. To change preferences in Chrome, visit chrome://flags.	Edge Full support 16 Full support 16 Full support 12 Alternate Name' Alternate Name' Uses the non-standard name: `-ms-grid-rows`	Firefox Full support 70 Full support 70 No support 52 — 70 Notes' Notes' Does not accept multiple track-size values. See bug 1339672. No support 40 — 59 Notes' Disabled' Notes' Does not accept multiple track-size values. See bug 1339672. Disabled' From version 40 until version 59 (exclusive): this feature is behind the `layout.css.grid.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE Full support 10 Alternate Name' Full support 10 Alternate Name' Alternate Name' Uses the non-standard name: `-ms-grid-rows`	Opera Full support 44 Full support 44 Full support 28 Disabled' Disabled' From version 28: this feature is behind the `Enable experimental Web Platform features` preference.	Safari Full support 10.1	WebView Android Full support 57	Chrome Android Full support 57 Full support 57 Full support 29 Disabled' Disabled' From version 29: this feature is behind the `Enable experimental Web Platform features` preference. To change preferences in Chrome, visit chrome://flags.	Firefox Android Partial support 52 Notes' Partial support 52 Notes' Notes' Does not accept multiple track-size values. See bug 1339672. No support 40 — 59 Notes' Disabled' Notes' Does not accept multiple track-size values. See bug 1339672. Disabled' From version 40 until version 59 (exclusive): this feature is behind the `layout.css.grid.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	Opera Android Full support 43 Full support 43 Full support 28 Disabled' Disabled' From version 28: this feature is behind the `Enable experimental Web Platform features` preference.	Safari iOS Full support 10.3	Samsung Internet Android Full support 6.0

Legend

Full support: Full support
Partial support: Partial support
See implementation notes.': See implementation notes.
User must explicitly enable this feature.': User must explicitly enable this feature.
Uses a non-standard name.': Uses a non-standard name.