The inset CSS property is a shorthand that corresponds to the top, right, bottom, and/or left properties. It has the same multi-value syntax of the margin shorthand.

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While part of the CSS Logical Properties specification, it does not define logical offsets. It defines physical offsets, regardless of the element's writing mode, directionality, and text orientation.


/* <length> values */
inset: 10px; /* value applied to all edges */
inset: 4px 8px; /* top/bottom left/right */
inset: 5px 15px 10px; /* top left/right bottom */
inset: 2.4em 3em 3em 3em; /* top right bottom left */

/* <percentage>s of the width (left/right) or height (top/bottom) of the containing block */
inset: 10% 5% 5% 5%;

/* Keyword value */
inset: auto;

/* Global values */
inset: inherit;
inset: initial;
inset: revert;
inset: revert-layer;
inset: unset;


The inset property takes the same values as the left property.

Formal definition

Initial valueauto
Applies topositioned elements
Percentagesrelative to the containing block’s size in the corresponding axis (e.g. width for left or right, height for top or bottom)
Computed valuesame as box offsets: top, right, bottom, left properties except that directions are logical
Animation typea length, percentage or calc();

Formal syntax

inset = 


Setting offsets for an element


  <span class="exampleText">Example text</span>


div {
  background-color: yellow;
  width: 150px;
  height: 120px;
  position: relative;

.exampleText {
  writing-mode: sideways-rl;
  position: absolute;
  inset: 20px 40px 30px 10px;
  background-color: #c8c800;



Unknown specification
# propdef-inset

Browser compatibility

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See also