JavaScript – Time Conversion – Millisecond (Execution/Run Time) To Human Readable

Posted on December 26, 2018December 26, 2018 By David Kittell

Sometimes when you are looking at execution time you want to make it easier to report the amount of time. The script below will help.

function msToTime(duration, OutputType) {
  var milliseconds = parseInt((duration % 1000) / 100),
    seconds = parseInt((duration / 1000) % 60),
    minutes = parseInt((duration / (1000 * 60)) % 60),
    hours = parseInt((duration / (1000 * 60 * 60)) % 24);

  hours = (hours < 10) ? "0" + hours : hours;
  minutes = (minutes < 10) ? "0" + minutes : minutes;
  seconds = (seconds < 10) ? "0" + seconds : seconds;

  if (OutputType == 1) {
    return hours + ":" + minutes + ":" + seconds + ":" + milliseconds;
  } else {
    return hours + " h " + minutes + " m " + seconds + " s " + milliseconds + ' ms';
  }
}

function testFunction() {
  document.write("<br>Output Type 1: " + msToTime(230495, 1));
  document.write("<br>Output Type 2: " + msToTime(230495, 2));
}

Example Output:
Output Type 1: 00:03:50:4
Output Type 2: 00 h 03 m 50 s 4 ms

And a full example is below

<!DOCTYPE html>
<html>
<head>
	<script type="text/javascript">
	         function msToTime(duration,OutputType) {
	            var milliseconds = parseInt((duration % 1000) / 100),
	                seconds = parseInt((duration / 1000) % 60),
	                minutes = parseInt((duration / (1000 * 60)) % 60),
	                hours = parseInt((duration / (1000 * 60 * 60)) % 24);

	            hours = (hours < 10) ? "0" + hours : hours;
	            minutes = (minutes < 10) ? "0" + minutes : minutes;
	            seconds = (seconds < 10) ? "0" + seconds : seconds;

	         if (OutputType == 1)
	         {
	         return hours + ":" + minutes + ":" + seconds + ":" + milliseconds;
	         }
	         else
	         {
	            return hours + " h " + minutes + " m " + seconds + " s " + milliseconds + ' ms';
	            }
	         }

	         function testFunction()
	         {
	         document.write("<br>Output Type 1: " + msToTime(230495,1));
	         document.write("<br>Output Type 2: " + msToTime(230495,2));
	         }
	</script>
	<title>Time Conversion - Millisecond (Execution/Run Time) To Human Readable</title>
</head>
<body onload="testFunction()">
</body>
</html>

All information on this site is shared with the intention to help. Before any source code or program is ran on a production (non-development) system it is suggested you test it and fully understand what it is doing not just what it appears it is doing. I accept no responsibility for any damage you may do with this code.

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