px to em

px-to-em

// It strips the unit of measure and returns it
@function strip-unit($num) {
  @return $num / ($num * 0 + 1);
}

// Converts "px" to "em" using the ($)em-base
@function convert-to-em($value, $base-value: $em-base)  {
  $value: strip-unit($value) / strip-unit($base-value) * 1em;
  @if ($value == 0em) { $value: 0; } // Turn 0em into 0
  @return $value;
}