Pixels to Ems

SCSS Usage

.item {
    font-size: em(12);
    font-size: em(12, 24);
}

CSS Output

.item {
    font-size: 0.75em;
    font-size: 0.5em;
}

SCSS Source

@function em($pxval, $base: $em-base) {
    @if not unitless($pxval) {
        $pxval: strip-units($pxval);
    }
    @if not unitless($base) {
        $base: strip-units($base);
    }
    @return ($pxval / $base) * 1em;
}