convert feet and inch to cm in javascript OR jquery

 var minheight = toInches(ui.values[0]);
           minheight = minheight.split("'");
           //convert feet to cm
           var feetcm = minheight[0]/0.032808;
           var inchcm = minheight[1].substr(0, minheight[1].length - 1);
           //convert inch to cm
           var inchcm = inchcm/0.39370;
           var minheightcm = (parseFloat(feetcm)+parseFloat(inchcm)).toFixed(2);
            

convert feet and inch to cm in php

//$new_values[23]['value'] = 4'8";

$hegt = explode('\'', $new_values[23]['value']);
              $feet = $hegt[0];
              $inches = rtrim($hegt[1],"\"");
              $inches = ($feet * 12) + $inches;
              $cm = (int) round($inches / 0.393701);