margin-bottom

BaselineWidely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers sinceJuly 2015.

Themargin-bottomCSSproperty sets themargin areaon the bottom of an element. A positive value places it farther from its neighbors, while a negative value places it closer.

Try it

The effect of the CSS margin-bottom property on the element box

This property has no effect onnon-replacedinline elements, such as<span>or<code>.

Syntax

css

/* <length> values */
margin-bottom: 10px; /* An absolute length */
margin-bottom: 1em; /* relative to the text size */
margin-bottom: 5%; /* relative to the nearest block container's width */

/* Keyword values */
margin-bottom: auto;

/* Global values */
margin-bottom: inherit;
margin-bottom: initial;
margin-bottom: revert;
margin-bottom: revert-layer;
margin-bottom: unset;

Themargin-bottomproperty is specified as the keywordauto,or a<length>,or a<percentage>.Its value can be positive, zero, or negative.

Values

<length>: The size of the margin as a fixed value.
<percentage>: The size of the margin as a percentage, relative to the inline size (widthin a horizontal language, defined bywriting-mode) of thecontaining block.
auto: The browser selects a suitable value to use. Seemargin.

Formal definition

Initial value	`0`
Applies to	all elements, except elements with table`display`types other than`table-caption`,`table`and`inline-table`.It also applies to`::first-letter`.
Inherited	no
Percentages	refer to the width of the containing block
Computed value	the percentage as specified or the absolute length
Animation type	alength

Formal syntax

margin-bottom =
<length-percentage>|
auto|
<anchor-size()>

<length-percentage> =
<length>|
<percentage>

<anchor-size()> =
anchor-size([<anchor-name>||<anchor-size>]?,<length-percentage>?)

<anchor-name> =
<dashed-ident>

<anchor-size> =
width|
height|
block|
inline|
self-block|
self-inline

Examples

Setting positive and negative bottom margins

HTML

html

<div class= "container" >
<div class= "box0" >Box 0</div>
<div class= "box1" >Box 1</div>
<div class= "box2" >Box one's negative margin pulls me up</div>
</div>

CSS

CSS for divs to set margin-bottom and height

css

.box0 {
margin-bottom: 1em;
height: 3em;
}
.box1 {
margin-bottom: -1.5em;
height: 4em;
}
.box2 {
border: 1px dashed black;
border-width: 1px 0;
margin-bottom: 2em;
}

Some definitions for container and divs so margins' effects can be seen more clearly

css

.container {
background-color: orange;
width: 320px;
border: 1px solid black;
}
div {
width: 320px;
background-color: gold;
}

Result

Specifications

Specification
CSS Box Model Module Level 3 #margin-physical

Browser compatibility

BCD tables only load in the browser