Centering text vertically and horizontally in a div

Question

I am using bootstrap and I am attempting to make a Cell that is 100% height and width of its host container.

The title is 30% of that space and the value is 70%. There are upper and lower limits of the value that take up 20% each leaving 60% of the space for the actual value.

HTML:

<div class="container-fluid parameterContainer">
<div class="row paramHead">
    <span class="virtAlignFix"></span>
    <div class="centerText">
      SPO2 (%)
     </div>
</div>
<div class="row paramValWrapper">
  <div class="row paramLimit">
    <span class="virtAlignFix"></span>
    <div class="centerText">
    200
    </div>
  </div> 
  <div class="row paramValue">
    <span class="virtAlignFix"></span>
    <div class="centerText">
    80
    </div>
  </div>
  <div class="row paramLimit">
    <span class="virtAlignFix"></span>
     <div class="centerText">
     40
     </div>
  </div>
</div>

CSS:

html {
    height: 100%;
    width: 100%;
}
body {
    height: 100%;
    width: 100%;
}
.virtAlignFix {
    line-height: 100%;
}

.parameterContainer {
    height: 100%;
    width: 100%;
}

.paramValWrapper {
    height: 70%;
    width: 100%;
}

.paramLimit {
    height: 20%;
    width: 100%;
    text-align:center
}

.paramHead {
    height: 30%;
    width: 100%;
    text-align:center
}

.paramValue {
    height: 80%;
    width: 100%;
    text-align:center
}

.centerText {
 vertical-align:middle; 
    display:inline-block;  
}

Fiddle of my attempt: http://jsfiddle.net/WCBjN/1173/

EDIT: added height % to body and page.

Answer 1

Making text central is fairly trivial, the easiest approach is as follows. You can check out the jsFiddle too: https://jsfiddle.net/jL9bs0j7/

.text-container {
  height:200px;
  width:400px;
  border: 1px solid #000;
  text-align: center;
}

.text-container span {
  display: block;
  position: relative;
  top: 50%;
  transform: translateY(-50%);
}

<div class="text-container">
  <span>Hello World</span>
</div>