Centering a Single Column Using Bootstrap 4 Grid System

Centering a single column using bootstrap 4 grid system

As per the documentation you can use justify-content-center on the row to center any number of columns in a row.

<div class="row justify-content-center">
  <div class="col-4">
    One centered column
  </div>
</div>

How to center content in a Bootstrap column?

Use:

<!-- unsupported by HTML5 -->
<div class="col-xs-1" align="center">

instead of

<div class="col-xs-1 center-block">

You can also use bootstrap 3 css:

<!-- recommended method -->
<div class="col-xs-1 text-center">

Bootstrap 4 now has flex classes that will center the content:

<div class="d-flex justify-content-center">
   <div>some content</div>
</div>

Note that by default it will be x-axis unless flex-direction is column

Center a column using Twitter Bootstrap 3

There are two approaches to centering a column <div> in Bootstrap 3:

Approach 1 (offsets):

The first approach uses Bootstrap's own offset classes so it requires no change in markup and no extra CSS. The key is to set an offset equal to half of the remaining size of the row. So for example, a column of size 2 would be centered by adding an offset of 5, that's (12-2)/2.

In markup this would look like:

<div class="row">
    <div class="col-md-2 col-md-offset-5"></div>
</div>

Now, there's an obvious drawback for this method. It only works for even column sizes, so only .col-X-2, .col-X-4, col-X-6, col-X-8, and col-X-10 are supported.

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Approach 2 (the old margin:auto)

You can center any column size by using the proven margin: 0 auto; technique. You just need to take care of the floating that is added by Bootstrap's grid system. I recommend defining a custom CSS class like the following:

.col-centered{
    float: none;
    margin: 0 auto;
}

Now you can add it to any column size at any screen size, and it will work seamlessly with Bootstrap's responsive layout:

<div class="row">
    <div class="col-lg-1 col-centered"></div>
</div>

Note: With both techniques you could skip the .row element and have the column centered inside a .container, but you would notice a minimal difference in the actual column size because of the padding in the container class.

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Update:

Since v3.0.1 Bootstrap has a built-in class named center-block that uses margin: 0 auto, but is missing float:none, you can add that to your CSS to make it work with the grid system.

Bootstrap4 grid system align cols to be close to each other

Use col-auto instead of *col, because you use fixed width for the boxes so that they takes as much space as necessary. And use justify-content-center for the row to align the columns in the center. Most importantly, use p-2 instead of m-2.

.box {  width: 200px;  height: 100px;  background: lightblue;}

<link href="http://stackpath.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet"/><div class="row no-gutters justify-content-center">   <div class="col-auto p-2">      <div class="box mx-auto">         hello      </div>   </div>   <div class="col-auto p-2">      <div class="box mx-auto">         hello      </div>   </div>   <div class="col-auto p-2">      <div class="box mx-auto">         hello      </div>   </div>   <div class="col-auto  p-2">      <div class="box mx-auto">         hello      </div>   </div>      <div class="col-auto p-2" >      <div class="box mx-auto">         hello      </div>   </div> </div>

Bootstrap Center Vertical and Horizontal Alignment

Bootstrap 5 (Updated 2021)

Bootstrap 5 is still flexbox based so vertical centering works the same way as it did in Bootstrap 4. For example, align-items-center (flex-direction: row) and justify-content-center (flex-direction: column) can used on the flexbox parent (row or d-flex).

Centering examples in Bootstrap 5

Vertical center (don't forget the parent must have a defined height!):

• my-auto for centering inside flex (.d-flex) elements
• my-auto can be used to center columns (.col-) inside row
• align-items-center to center columns (col-*) inside row

Horizontal center:

• text-center to center display:inline elements & column content
• mx-auto for centering inside flex elements
• mx-auto can be used to center columns (.col-) inside row
• justify-content-center to center columns (col-*) inside row

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Bootstrap 4.3+ (Update 2019)

There's no need for extra CSS. What's already included in Bootstrap will work. Make sure the container(s) of the form are full height. Bootstrap 4 now has a h-100 class for 100% height...

Vertical center:

<div class="container h-100">
  <div class="row h-100 justify-content-center align-items-center">
    <form class="col-12">
      <div class="form-group">
        <label for="formGroupExampleInput">Example label</label>
        <input type="text" class="form-control" id="formGroupExampleInput" placeholder="Example input">
      </div>
      <div class="form-group">
        <label for="formGroupExampleInput2">Another label</label>
        <input type="text" class="form-control" id="formGroupExampleInput2" placeholder="Another input">
      </div>
    </form>   
  </div>
</div>

https://codeply.com/go/raCutAGHre

the height of the container with the item(s) to center should be 100%
(or whatever the desired height is relative to the centered item)

Note: When using height:100% (percentage height) on any element, the element takes in the height of it's container. In modern browsers vh units height:100vh; can be used instead of % to get the desired height.

Therefore, you can set html, body {height: 100%}, or use the new min-vh-100 class on container instead of h-100.

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Horizontal center:

• text-center to center display:inline elements & column content
• mx-auto for centering inside flex elements
• offset-* or mx-auto can be used to center columns (.col-)
• justify-content-center to center columns (col-*) inside row

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Vertical Align Center in Bootstrap

Bootstrap 4 full-screen centered form

Bootstrap 4 center input group

Bootstrap 4 horizontal + vertical center full screen

Centering text in row with bootstrap grid

See you have already used .text-center on you .project-name which align text to center, so what I could suggest is that try pseudo selector ::before as below,

.text-center::before{
  content:"";
  margin-left:calc(100% - 75%);
} 

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