How to get HH:MM:SS difference using milliseconds in javascript?

Question

I have two times like one is 145:02:31 and another one is 01:00:00 and I want to calculate the difference between these two times like 144:02:31 but right now I am getting 13:02:31 which is wrong.

Please help me thank you.

Answer 1

It's a little crude with the formatting but works just the way you need.

 function format_ms(time_ms) { let hours = 0; let minutes = 0; let seconds = 0; hours = parseInt(time_ms / 3600000).toString(); time_ms %= 3600000; minutes = parseInt(time_ms / 60000).toString(); time_ms %= 60000; seconds = parseInt(time_ms / 1000).toString(); return hours + ":" + minutes.padStart(2, '0') + ":" + seconds.padStart(2, '0'); } let start = moment.duration('145:02:31'); let end = moment.duration('1:00:00'); let delta_ms = start - end; // in ms console.log(format_ms(delta_ms)); 

 <script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.24.0/moment.min.js"></script> 

Answer 2

var duration = moment.duration(endTime.diff(startTime));
var hours = duration.asHours();

It will give you the time difference in hours.

Answer 3

Here a try without any external lib. steps -> 1. convert the timestamp in seconds 2. calculate diff 3. revert second into desired format

function diff(a, b){
  const getSec = val => {
    const arr = val.split(':')
    return Number(arr[2]) + Number(arr[1])*60 + Number(arr[0])*3600
   }
  const diff =  getSec(a) - getSec(b)

  const h = parseInt(diff/3600)
  const m = parseInt((diff - h*3600)/60)
  const s = diff%60

  return`${h}:${m}:${s}`
}

diff("145:02:31", "01:00:00" ) //"144:2:31"

Answer 4

 // Convert time in format H:mm:ss to seconds function hrsToSecs(hrs) { var b = hrs.split(':'); return b[0]*3600 + b[1]*60 + +b[2]; } // Convert seconds to time in format H:mm:ss function secsToHrs(secs) { var z = n => (n<10? '0':'') + n; return (secs/3600 | 0) + ':' + z(secs%3600/60 | 0) + ':' + z(secs%60); } // Get different between times in H:mm:ss format // Subtract first time from second function timeDiff(t0, t1) { var diff = hrsToSecs(t1) - hrsToSecs(t0); return (diff < 0? '-' : '') + secsToHrs(Math.abs(diff)); } console.log(timeDiff('1:01:01','0:01:00')) console.log(timeDiff('01:00:00','145:02:31'));