Answers for "align content inside div to center"

center text inside a div

text-align: center;
vertical-align: middle;
line-height: 90px;       /* The same as your div height */

how to align contents of div in center

1. Enclose the div that you want to center with a parent element 
(commonly known as a wrapper or container)

2. Set “text-align: center” to parent element.

3. Then set the inside div to “display: inline-block”