Css div static height

height

The height CSS property specifies the height of an element. By default, the property defines the height of the content area. If box-sizing is set to border-box , however, it instead determines the height of the border area.

Try it

The min-height and max-height properties override height .

Syntax

/* values */ height: 120px; height: 10em; height: 100vh; /* value */ height: 75%; /* Keyword values */ height: max-content; height: min-content; height: fit-content(20em); height: auto; /* Global values */ height: inherit; height: initial; height: revert; height: revert-layer; height: unset; 

Values

Defines the height as a distance value.

Defines the height as a percentage of the containing block’s height.

The browser will calculate and select a height for the specified element.

The intrinsic preferred height.

The intrinsic minimum height.

Box will use the available space, but never more than max-content

Uses the fit-content formula with the available space replaced by the specified argument, i.e. min(max-content, max(min-content, ))

Enables selecting a middle value within a range of values between a defined minimum and maximum

Accessibility concerns

Ensure that elements set with a height aren’t truncated and/or don’t obscure other content when the page is zoomed to increase text size.

Formal definition

Initial value	auto
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 value computes to auto . A percentage height on the root element is relative to the initial containing block.
Computed value	a percentage or auto or the absolute length
Animation type	a length, percentage or calc();

Formal syntax

height =
auto |
|
min-content |
max-content |
fit-content( )

=
|

Examples

Setting height using pixels and percentages

HTML

div id="taller">I'm 50 pixels tall.div> div id="shorter">I'm 25 pixels tall.div> div id="parent"> div id="child">I'm half the height of my parent.div> div> 

CSS

div  width: 250px; margin-bottom: 5px; border: 2px solid blue; > #taller  height: 50px; > #shorter  height: 25px; > #parent  height: 100px; > #child  height: 50%; width: 75%; > 

Result

Specifications

Browser compatibility

BCD tables only load in the browser

See also

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This page was last modified on Jul 18, 2023 by MDN contributors.

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How to Use CSS to Set the Height of an HTML Element to 100%

Jennifer Kyrnin is a professional web developer who assists others in learning web design, HTML, CSS, and XML.

Jessica Kormos is a writer and editor with 15 years’ experience writing articles, copy, and UX content for Tecca.com, Rosenfeld Media, and many others.

Percentage values in CSS can be tricky. When you set the height CSS property of an element to 100% what exactly are you setting it to 100% of? That’s the major question you run into when dealing with percentages in CSS, and as layouts become more complex, it becomes that much more difficult to keep track of percentages, resulting in some downright bizarre behavior, if you aren’t careful.

Working with percentages does have a distinct advantage; percentage-based layouts automatically adapt to different screen sizes. That’s why using percentages is essential in responsive design. Popular grid systems and CSS frameworks use percentage values to create their responsive grids.

Clearly, there are certain situations better suited to static values and others that work much better with something adaptive, like percentages. You’ll need to decide which route to take with the elements in your design.

Static Units

Pixels are static. Ten pixels on one device is ten pixels on every device. Sure, there are things like density and the way a device actually interprets what a pixel is, but you won’t ever see major changes because the screen is a different size.

With CSS, you can easily define an element’s height in pixels, and it will remain the same. It’s predictable.

That won’t change unless you alter it with JavaScript or something similar.

Now, there’s another side to that coin. It won’t change. That means you’ll need to measure out everything precisely, and even then, your site won’t work across all devices. That’s why static units tend to work better for child elements, media, and things that will start to distort and look strange if they stretch and grow.

Setting an Element’s Height to 100%

When you set an element’s height to 100%, does it extend to the entire screen height? Sometimes. CSS always treats percent values as a percentage of the parent element.

With No Parent Element

If you’ve created a fresh that’s only contained by your site’s body tag, 100% will probably equate to the screen’s height. That is unless you defined a height value for the .

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