margin-right

The margin-right CSS property sets the margin area on the right side of an element. A positive value places it farther from its neighbors, while a negative value places it closer.

The vertical margins of two adjacent boxes may fuse. This is called margin collapsing.

Syntax

/* <length> values */
margin-right: 20px;  /* An absolute length */
margin-right: 1em;   /* relative to the text size */
margin-right: 5%;    /* relative to the nearest block container's width */

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

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

The margin-right property is specified as the keyword auto, 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 (width in a horizontal language, defined by writing-mode) of the containing block.

auto

The right margin receives a share of the unused horizontal space, as determined mainly by the layout mode that is used. If the values of margin-left and margin-right are both auto, the calculated space is evenly distributed. This table summarizes the different cases:

Value of `display`	Value of `float`	Value of `position`	Computed value of `auto`	Comment
`inline`, `inline-block`, `inline-table`	any	`static` or `relative`	`0`	Inline layout mode
`block`, `inline`, `inline-block`, `block`, `table`, `inline-table`, `list-item`, `table-caption`	any	`static` or `relative`	`0`, except if both `margin-left` and `margin-right` are set to `auto`. In this case, it is set to the value centering the element inside its parent.	Block layout mode
`block`, `inline`, `inline-block`, `block`, `table`, `inline-table`, `list-item`, `table-caption`	`left` or `right`	`static` or `relative`	`0`	Block layout mode (floating element)
any `table-`, except* `table-caption`	any	any	`0`	Internal `table-*` elements don't have margins, use `border-spacing` instead
any, except `flex`, `inline-flex`, or `table-*`	any	`fixed` or `absolute`	`0`, except if both `margin-left` and `margin-right` are set to `auto`. In this case, it is set to the value centering the border area inside the available `width`, if fixed.	Absolutely positioned layout mode
`flex`, `inline-flex`	any	any	`0`, except if there is any positive horizontal free space. In this case, it is evenly distributed to all horizontal `auto` margins.	Flexbox layout mode

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` and `::first-line`.
Inherited	no
Percentages	refer to the width of the containing block
Computed value	the percentage as specified or the absolute length
Animation type	a length

Formal syntax

<length> | <percentage> | auto

Examples

Setting right margin using pixels and percentages

.content { margin-right: 5%; }
.sidebox { margin-right: 10px; }
.logo    { margin-right: -5px; }

Specifications

Specification
CSS Box Model Module Level 3 # margin-physical

Browser compatibility

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