CSS Centering Centering with fixed size


Example

If the size of your content is fixed, you can use absolute positioning to 50% with margin that reduces half of your content's width and height:

HTML

<div class="center">
    Center vertically and horizontally
</div>

CSS

.center {
    position: absolute;
    background: #ccc;

    left: 50%;
    width: 150px;
    margin-left: -75px;  /* width * -0.5 */

    top: 50%;
    height: 200px;
    margin-top: -100px;  /* height * -0.5 */
}

Horizontal centering with only fixed width

You can center the element horizontally even if you don't know the height of the content:

HTML

<div class="center">
    Center only horizontally
</div>

CSS

.center {
    position: absolute;
    background: #ccc;

    left: 50%;
    width: 150px;
    margin-left: -75px;  /* width * -0.5 */
}

Vertical centering with fixed height

You can center the element vertically if you know the element's height:

HTML

<div class="center">
    Center only vertically
</div>

CSS

.center {
    position: absolute;
    background: #ccc;

    top: 50%;
    height: 200px;
    margin-top: -100px;  /* width * -0.5 */
}