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 September 2021.

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

The margin-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 id="default-example"> <div id="container"> <div class="row">One</div> <div class="row transition-all" id="example-element">Two</div> <div class="row">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: #ffffff; 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(--myAnchor 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 the margin-top, margin-right, margin-bottom, or margin-left property depending on the values defined for writing-mode, direction, and text-orientation.

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

Values

The margin-block-end property takes the same values as the margin-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	a length

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 class="exampleText">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