How to Center a button horizontally in a div

In this tutorial, we are going to learn about how to center a button horizontally in a div element with CSS.

Consider, we have the following button in div:

<div class="container">
  <button id="btn">Login</button>
</div>

To center a button horizontally inside a div, add the display:flex and justify-content: center to the div CSS class.

“justify-content: center” centers the button horizontally.

Here is an example:

<div class="container">
  <button id="btn">Login</button>
</div>

CSS:

.container{
    display: flex;
    justify-content: center;
}

or we can add the inline styles to div element using the style attribute in HTML.

<div style="display: flex;justify-content: center;" >
  <button id="btn">Login</button>
</div>

Centering the button in div using absolute position

We can use the absolute positioning in css to center the button horizontally in div.

Here is an example:

<div class="container">
  <button id="btn">Login</button>
</div>

.container{
   position:absolute;
   left:50%;
   transform:translateX(-50%);
}

1. In the example above, we have added position:absolute to the div element CSS class.So the element breaks out from the normal document flow and positioned to its relative parent (eg: body or parent element).

2. The left:50% moves the element 50% right from its position.

3. The translateX(-50%) moves the element 50% left from it’s position.