HTML table full width with margin

Question

I have a table:

<table border=1>
    <caption>This is a table.</caption>
    <tr>
        <th>One</th>
        <th>Two</th>
        <th>Three</th>
    </tr>
    <tr>
        <td>Four</td>
        <td>Five</td>
        <td>Six</td>
    </tr>
</table>

and I want it to be as wide as possible while still leaving a 20px margin on each side. So, I did this:

table{
    border-collapse:collapse;
    margin:20px;
    padding:0;
    width:100%;
}

but it ends up being the width of the parent plus an extra 20px margin on the left, causing a vertical scroll bar to appear. Is there any way to make it 40px less than the parent's width without adding another element to surround it?

jsfiddle: http://jsfiddle.net/pvHNM/

possible duplicate of [Div width 100% minus fixed amount of pixels](http://stackoverflow.com/questions/651317/div-width-100-minus-fixed-amount-of-pixels) — Gajus, Apr 06 '14 at 13:15

score 26 · Accepted Answer · answered Jul 23 '14 at 19:03

26

use calc() to calculate the intended width:

table {
    margin: auto;
    width: calc(100% - 40px);
}

http://jsfiddle.net/EXS76/1/

answered Jul 23 '14 at 19:03

Michael

6,895
3
23
19

5

It's easy to forget that it's now OK to use some of these new features. http://caniuse.com/#search=calc – Michael Cordingley Aug 27 '14 at 18:31
@MichaelCordingley agreed, it doees feel strange to combine such a new CSS feature with the old school
– Michael Dec 16 '14 at 17:20

score 13 · Answer 2 · answered Jan 11 '12 at 01:08

By CSS rules, the width property sets the width of the content of an element, so you are requiring that 100% of the available width be allocated to the table itself and some additional space be allocated for margins. This inevitably causes horizontal scrolling.

As a workaround, you can wrap the table inside a div element and set margin on it.

score 3 · Answer 3 · answered Feb 27 '13 at 12:35

3

You can set a padding on the table-element. The thead, tbody and tfoot and rows within will fill up the space in the table.

table
{
    border-collapse:collapse;
    padding:20px;
    margin:0;
    width:100%;
}

answered Feb 27 '13 at 12:35

Victor

47
1
1

1

Seems that this does not work (any more?): https://jsfiddle.net/kvpupvo8/1/ – BurninLeo Jan 14 '18 at 11:22

score 2 · Answer 4 · answered Apr 14 '15 at 17:32

I found the best answer useful, but it doesn't work in older browsers. What best suited for me was a DIV outside the table setting the margin. Then, the 100% width of the parent would be influenced by this div, not the parent element.

<div style="margin">
  <table style="width:100%">
  </table>
</div>

HTML table full width with margin

4 Answers4