The effect of the CSS margin-bottom property on the element boxEl margin-bottom CSS  (margen-inferior) es la propiedad de un elemento que establece el espacio requerido en la parte inferior de un elemento. Tambien se permiten valores negativos.

Esta propiedad no tiene ningun efecto sobre los elementos en linea non-replaced , como <tt> o <span>.

Valor inicial0
Applies toall elements, except elements with table display types other than table-caption, table and inline-table. It also applies to ::first-letter.
Percentagesrefer to the width of the containing block
Valor calculadothe percentage as specified or the absolute length
Animation typea length
Canonical orderel orden √ļnico no-ambig√ľo definido por la gram√°tica formal


Formal syntax: <length> | <percentage> | auto
margin-bottom: 10px;        /* Una longitud absoluta (sin redimension) */
margin-bottom: 1em;         /* Una longitud en relacion con el tama√Īo del texto */
margin-bottom: 5%;          /* Un margen respecto al ancho de su objeto padre (el que lo contiene)  */
margin-bottom: auto;

margin-bottom: inherit; /*margen heredado*/


Specifies a fixed width. See <length> for possible values.
A <percentage> always relative to the width of the containing block.
See margin.


.content { margin-bottom:   5%; }
.sidebox { margin-bottom: 10px; }
.logo    { margin-bottom: -5px; }
#header  { margin-bottom:  1em; }


Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 1.0 1.0 (1.7 o anterior) 3.0 3.5 1.0 (85)
auto value 1.0 1.0 (1.7 o anterior) 6.0 (strict mode) 3.5 1.0 (85)
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support 1.0 1.0 (1) 6.0 6.0 1.0