margin-block-end

Baseline Widely available *

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨January 2020⁩.

* Some parts of this feature may have varying levels of support.

Themargin-block-endCSS property defines the logical block end margin of an element, which maps to a physical margin depending on the element's writing mode, directionality, and text orientation.

Try it

margin-block-end: 20px;writing-mode: horizontal-tb;

margin-block-end: 20px;writing-mode: vertical-rl;

margin-block-end: 20%;writing-mode: horizontal-tb;

margin-block-end: auto;writing-mode: vertical-lr;

<section>  <div>    <div>One</div>    <div>Two</div>    <div>Three</div>  </div></section>

#container {  width: 300px;  height: 200px;  display: flex;  align-content: flex-start;  flex-direction: column;  justify-content: flex-start;}.row {  height: 33.33%;  display: inline-block;  border: solid #ce7777 10px;  background-color: #2b3a55;  color: white;  flex-shrink: 0;}#example-element {  border: solid 10px #ffbf00;  background-color: #2b3a55;}

Syntax

css

/* <length> values */margin-block-end: 10px; /* An absolute length */margin-block-end: 1em; /* relative to the text size */margin-block-end: 5%; /* relative to the nearest block container's width */margin-block-end: anchor-size(inline);margin-block-end: calc(anchor-size(--my-anchor block, 20px) / 4);/* Keyword values */margin-block-end: auto;/* Global values */margin-block-end: inherit;margin-block-end: initial;margin-block-end: revert;margin-block-end: revert-layer;margin-block-end: unset;

It corresponds to themargin-top,margin-right,margin-bottom, ormargin-left property depending on the values defined forwriting-mode,direction, andtext-orientation.

It relates tomargin-block-start,margin-inline-start, andmargin-inline-end, which define the other margins of the element.

Values

Themargin-block-end property takes the same values as themargin-left property.

Formal definition

Initial value	`0`
Applies to	same as`margin`
Inherited	no
Percentages	depends on layout model
Computed value	if specified as a length, the corresponding absolute length; if specified as a percentage, the specified value; otherwise,`auto`
Animation type	alength

Formal syntax

margin-block-end =
<'margin-top'>

<margin-top> =
<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 block end margin

HTML

html

<div>  <p>Example text</p></div>

CSS

css

div {  background-color: yellow;  width: 120px;  height: 120px;}.exampleText {  writing-mode: vertical-rl;  margin-block-end: 20px;  background-color: #c8c800;}

Result

Specifications

Specification
CSS Logical Properties and Values Level 1 # margin-properties

Browser compatibility

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This page was last modified on⁨Oct 30, 2025⁩ byMDN contributors.

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