How to vertically align center a div in bootstrap?

Question

As you can see my element is not vertically aligned center. How can I vertically align center all elements in a row according to the biggest element in the main div block?

 <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/css/bootstrap.min.css" rel="stylesheet"/> <div class="container"> <div class="row"> <div class="col-md-12"> <div style=""> <div class="col-md-6" style="padding-left: 0;"> <div class="form-group"> <label style="margin-right: 10px">Marital Status:</label> <div class="radio-inline" style="padding-left: 0;"> <label class="radio-inline"><input type="radio" name="marital_status" value="Single">Single</label> </div> <div class="radio-inline"> <label class="radio-inline"><input type="radio" name="marital_status" value="Married">Married</label> </div> </div> </div> <div class="col-md-6" style="padding-right: 0;"> <div class="row"> <div class="col-md-8"> <div class="form-group"> <label for="address_1">Hobby:</label> <input type="text" class="form-control" name="hobbies[]"> </div> </div> <div class="col-md-4"> <button type="button" class="btn btn-primary btn-block">+</button> </div> </div> </div> </div> </div> </div> </div> 

Answer 1

I just add few CSS in your code. Try this i hope it'll help you out. Thanks

html, 
body {
  height: 100%;
}

.verticalAlignContainer {
  display: flex;
  align-items: center;
  height: 100%;
}

.verticalAlignContainer .row {
  width: 100%;
}

and use verticalAlignContainer class with container .

<div class="container verticalAlignContainer">

 html, body { height: 100%; } .verticalAlignContainer { display: flex; align-items: center; height: 100%; } .verticalAlignContainer .row { width: 100%; } 

 <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/css/bootstrap.min.css" rel="stylesheet"/> <div class="container verticalAlignContainer"> <div class="row"> <div class="col-md-12"> <div style=""> <div class="col-md-6" style="padding-left: 0;"> <div class="form-group"> <label style="margin-right: 10px">Marital Status:</label> <div class="radio-inline" style="padding-left: 0;"> <label class="radio-inline"><input type="radio" name="marital_status" value="Single">Single</label> </div> <div class="radio-inline"> <label class="radio-inline"><input type="radio" name="marital_status" value="Married">Married</label> </div> </div> </div> <div class="col-md-6" style="padding-right: 0;"> <div class="row"> <div class="col-md-8"> <div class="form-group"> <label for="address_1">Hobby:</label> <input type="text" class="form-control" name="hobbies[]"> </div> </div> <div class="col-md-4"> <button type="button" class="btn btn-primary btn-block">+</button> </div> </div> </div> </div> </div> </div> </div>