Mat-icon does not center in its div

Question

You can add vertical align to the mat-icon element or .mat-icon class:

To override all material icons with global CSS: Stackblitz

.mat-icon {
    vertical-align: middle;
}

ATENTION: If your text have capital letters, add negative margin to prevent visual issues on some browsers (Stackblitz demo).
Also you can simply use vertical-align: sub or vertical-align: bottom if fits better with your requirements. Check following alignment MDN demo

Using FLEX with a container element for each icon/text: Stackblitz

CSS:

.icon-text {
    display: flex;
    align-items: center;
}

HTML:

<div class="icon-text">
   <mat-icon>home</mat-icon>
   <span>Some text here 1</span>
</div>

To style a particular material icon with utility class: Stackblitz

In some global css file:

.v-align-middle { 
    vertical-align: middle;
}

HTML:

<div>
   <mat-icon class="v-align-middle">home</mat-icon>
   <span class="v-align-middle">Some text here 1</span>
</div>

** some css frameworks already have classes like this, eg: bootstrap 4 **

To style a particular material icon: Stackblitz

CSS:

.custom-class mat-icon {
    vertical-align: middle;
}

/** or using the class .mat-icon */
.custom-class .mat-icon {
    vertical-align: middle;
}

HTML:

<div class="custom-class">
   <mat-icon>home</mat-icon>
   <span>Some text here 1</span>
</div>

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