SASS functions for px to em and em to px

SASS px to em and em to px

$eminpx:14;

@function pxtoem($target, $context:$eminpx){
  @return #{$target/$context}em;
}

@function emtopx($target, $context:$eminpx){
	@return #{$target*$context}px;
}

/* this can take one or two arguments:

margin-bottom: pxtoem(10); // this will use the $eminpx variable as the second value
margin-bottom: pxtoem(10,18);

*/