Robot Speed Calculator

<div id="SpeedCalc" class="table_small no_print">

<h3 id="calculator" class="table_small"><i class="fa fa-tachometer fa-2x" aria-hidden="true" style="color: #CC0000"></i> Robot Speed Calculator</h3>

<p><i>* If the red fields in the form below are not populated, please refresh your browser.</i></p>

      <ul>

        <li><label for="rpm">Motor Output Speed</label> <input type="text" name="rpm" value="190"> <span>rpm</span></li>

        <li><label for="ratio">Reduction*</label> <input type="text" name="ratio" value="1"> <span>ratio</span></li>

        <li><label for="diameter">Wheel Diameter</label> <input type="text" name="diameter" value="6"> <span>inches</span></li>

        <li><label for="circ">Wheel Circumference</label> <input type="text" name="circ" disabled="disabled"> <span>inches</span></li>

        <li><label for="speedIPM">Speed</label> <input type="text" name="speedIPM" disabled="disabled"> <span>inches per minute</span></li>

        <li><label for="speedFPM">Speed</label> <input type="text" name="speedFPM" disabled="disabled"> <span>feet per minute</span></li>

        <li><label for="speedMPH">Speed</label> <input type="text" name="speedMPH" disabled="disabled"> <span>miles per hour</span></li>

        <li><label for="speedMPM">Speed</label> <input type="text" name="speedMPM" disabled="disabled"> <span>meters per minute</span></li>

        <li><label for="speedKPH">Speed</label> <input type="text" name="speedKPH" disabled="disabled"> <span>km per hour</span></li>

        <li>* This is the reduction from the output of the gear motor to the wheel. If direct drive, reduction = 1. If your reduction is 1:2 put in 0.5.</li>

      </ul>

    </div>

<script type="text/javascript">

// <![CDATA[

    $("input:enabled").change(function() {

            calcValues();

        });
        function calcValues () {

            var rpm = $("input[name='rpm']").val();

            var ratio = $("input[name='ratio']").val();

            var cir = $("input[name='diameter']").val() * Math.PI;

            var ipm = rpm * ratio * cir;

            var fpm = ipm / 12.0;

            var mph = fpm * 60 / 5280;

            var mpm = fpm * 0.3048;

            var kph = mpm * 60 / 1000;
            $("input[name='circ']").val(cir.toFixed(2));

            $("input[name='speedIPM']").val(ipm.toFixed(2));

            $("input[name='speedFPM']").val(fpm.toFixed(2));

            $("input[name='speedMPH']").val(mph.toFixed(2));

            $("input[name='speedMPM']").val(mpm.toFixed(2));

            $("input[name='speedKPH']").val(kph.toFixed(2));

        }
        $(function() {

            calcValues();

        });

    // ]]>

    </script>