margin-right property CSS Reference



Definition and Usage

The margin-right CSS property of an element sets the margin space required on the right side of an element. A negative value is also allowed.

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

  • Initial 0
  • Applies to all elements except elements with table display types other than table-caption, table and inline-table
  • Inherited no
  • Percentages refer to the width of the containing block
  • Media visual
  • Computed Value the percentage as specified or the absolute length
  • Animatable yes, as a length
  • Canonical order the unique non-ambiguous order defined by the formal grammar

Syntax

Formal syntax: <length> | <percentage> | auto
margin-right: 20px;        /* An absolute length */
margin-right: 1em;         /* A length relative to the text size */
margin-right: 5%;          /* A margin relative to the nearest block container's width */
margin-right: auto;
margin-right: inherit;

Values

<length>
Is a <length> specifying a fixed width: it can be absolute width, e.g. in px, or a width relative to the text size, e.g. in em, or relative to the viewport size, e.g. in vh.
<percentage>
Is a <percentage> relative to the width of the nearest containing block.
auto
Is a keyword indicating that the right margin receives a share of the remaining space, defined mainly by the current layout mode.. If there several auto values for margin-left or margin-right, the calculated space is evenly distributed between all the auto values. This table summarizes the different cases:
Value of displayValue of floatValue of positionComputed value of autoComment
inline, inline-block, inline-tableany static or relative0Inline layout mode
block, inline, inline-block, block, table, inline-table, list-item, table-captionany 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 relative0Block layout mode (floating element)
any table-*, except table-captionanyany0Internal 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-flexanyany 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

Examples

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

Compatibility

Desktop browsers

FeatureChromeFirefox (Gecko)Internet ExplorerOperaSafari (WebKit)
Basic support1.01.0 (1.7 or earlier)3.03.51.0 (85)
auto value1.01.0 (1.7 or earlier)6.0 (strict mode)3.51.0 (85)

Mobile browsers

FeatureAndroidFirefox Mobile (Gecko)IE PhoneOpera MobileSafari Mobile
Basic support1.01.0 (1)6.06.01.0

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