The column-gap CSS property sets the size of the gap between columns for elements which are specified to be displayed as multi-column elements.

Initial valuenormal
Applies tomulticol elements
Computed valuethe absolute length or the keyword normal
Animatableyes, as a length
Canonical orderthe unique non-ambiguous order defined by the formal grammar


/* Keyword value */
column-gap: normal; 

/* <length> values */
column-gap: 3px;
column-gap: 2.5em;

/* Global values */
column-gap: inherit;
column-gap: initial;
column-gap: unset;


Is a keyword indicating to use the browser-defined default spacing between columns. The specification, which most modern browsers follow, recommends that this be equal to a length of 1em.
Is a <length> value defining the size of the gap between columns. It must not be negative, but may be equal to 0.

Formal syntax

<length> | normal


.content-box {
  border: 10px solid #000000;
  column-count: 3;
  column-gap: 20px;


Specification Status Comment
CSS Multi-column Layout Module
The definition of 'column-gap' in that specification.
Candidate Recommendation Initial definition

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support (Yes)-webkit 1.5 (1.8)-moz[1] 10 11.10 3.0 (522)-webkit
Unprefixed 50.0        
Feature Android Android Webview Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile Chrome for Android
Basic support ? ? (Yes) ? ? ? ?
Unprefixed No support 50.0         50.0

[1] Before Firefox 3 (Gecko 1.9), the default value associated to the normal keyword was 0 and not 1em.

See also

Document Tags and Contributors

 Last updated by: jpmedley,