HTML <colgroup> width Attribute

❮ HTML <colgroup> tag


A <colgroup> element that specifies that the first column should have a predefined width of 200 pixels:

  <colgroup width="200">
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Definition and Usage

The width attribute specifies the width of a column group.

Normally, a column group takes up the space it needs to display the content. The width attribute is used to set a predefined width of a column group.

Note: This attribute will be overwritten by any width set by <col> elements.

Browser Support

width Yes Yes Yes Yes Yes

The width attribute is supported in all major browsers. However, none of the browsers support the relative_length value.

Compatibility Notes

The width attribute of <colgroup> is not supported in HTML5. Use CSS instead.

CSS syntax: <td style="width:200px">

CSS Example: Specify width of a table column

In our CSS tutorial you can find more details about the width property.


<colgroup width="pixels|%|relative_lngth">

Attribute Values

Value Description
pixels Sets the width in pixels (example: width="50")
% Sets the width in percent of the surrounding element (example: width="50%")
relative_length Shares the available pixels into parts. (e.g. A table is 100 px, the first column group is 20 px, the second is 50%, the available pixels will then be 30px). One part is set like this: "1*".

Example: If 30 px of space are available, you can have one "1*" and one "2*", which will be interpreted as 10 and 20 px (think of 1* as one part, and 2* as two parts).

❮ HTML <colgroup> tag