@function grid-column($columnsCount, $gutter, $size) {
  $gutter: $gutter * 1px;
  $gutters: ($columnsCount - 1) * $gutter;

  @return calc((((100% - #{$gutters}) / #{$columnsCount}) * #{$size}) + #{max(($size - 1) * $gutter, 0)});
}