<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script> <script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="divcenter-main"> <div class="inner"></div> </div>

html { height: 100%; width: 100%; } body { display: table; height: 100%; width: 100%; } .divcenter-main { display: table-cell; height: 100%; width: 100%; vertical-align: middle; } .inner { height: 100px; width: 100px; background: tomato; margin: auto; }