Margin all-in-one spec

margin

Use this property to specify margin-top, margin-right, margin-bottom, and margin-left.

Property values

This property is used to set each of the four margin properties, which may also be set one by one:

This property expects anywhere from one to four values, with their interpretation as follows:

number of values sides effected
1 value Sets all four sides: top, right, bottom, left
2 values 1st value: top and bottom margins
2nd value: right and left margins
3 values 1st value: top margin
2nd value: right and left margins
3rd value: bottom margin
4 values 1st value: top margin
2nd value: right margin
3rd value: bottom margin
4th value: left margin

Use the auto keyword to let the browser determine how much margin to apply. When the left and right margins are both set to auto, the element is centered within its parent.

Use any of these font-relative typographic units to set the size of the margin:

em em The font-size of the current font
rem relative em The font-size of the <html> element
lh line height The line-height of the current font
rlh relative line height The line-height of the <html> element
cap cap height The nominal height of the current font's capital letters
ex "x" The height of the current font's "x" glyph
ch "0" The advance measure (the width) of the current font's "0" glyph
ic ideograph count The advance measure (the width) of the current font's "水" ideograph

Or use any of these fixed size units which are independent of the current font:

in inch A size equal 96px
px pixels A size equal to 1/96 inch
pt point A size equal 1in/72 = 1.33px
pc pica A size equal 1in/6 = 12pt = 16px
cm centimeter A size equal to 96px/2.54 = 37.8px
mm millimeter A size equal to 96px/25.4 = 3.8px
Q quarter millimeter A size equal to 96px/1016 = 0.94px

Examples

/* An element centered within its parent area */            
margin: 0 auto;
margin

style > whitespace > marginMargin all-in-one spec

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