Convert Milliseconds to Minutes and Seconds in JavaScript

Convert Milliseconds to Minutes and Seconds in JavaScript #

To convert milliseconds to minutes and seconds:

Divide the milliseconds by 60000 to convert them to minutes.
Convert the remainder to seconds.
Pad the seconds to two digits if the value is less than 10.

index.js

Copied!
function padTo2Digits(num) {
  return num.toString().padStart(2, '0');
}

function convertMsToMinutesSeconds(milliseconds) {
  const minutes = Math.floor(milliseconds / 60000);
  const seconds = Math.round((milliseconds % 60000) / 1000);

  return seconds === 60
    ? `${minutes + 1}:00`
    : `${minutes}:${padTo2Digits(seconds)}`;
}

console.log(convertMsToMinutesSeconds(296900)); // 👉️ 4:57
console.log(convertMsToMinutesSeconds(296499)); // 👉️ 4:56
console.log(convertMsToMinutesSeconds(992000)); // 👉️ 16:32

We created a reusable function, which takes the milliseconds as a parameter and converts them to minutes and seconds.

The first thing we did is create a padTo2Digits function, which will take care of adding a leading zero if the seconds only contain a single digit (are less than 10).

We want to make sure the result does not alternate between single and double digit values depending on the seconds.

In our convertMsToTime function, we:

Converted the milliseconds to minutes.
Converted the remainder to seconds.

If the value for the seconds is equal to 60, we have to add 1 minute to the minutes and set the seconds back to 0.

In any other case, we return the minutes and use the padTo2Digits function to pad the seconds to 2 digits if their value is less than 10.

index.js

Copied!
function padTo2Digits(num) {
  return num.toString().padStart(2, '0');
}

console.log(padTo2Digits(2)); // 👉️ '02'
console.log(padTo2Digits(4)); // 👉️ '04'
console.log(padTo2Digits(10)); // 👉️ '10'

You can also use this approach to pad the minutes, if you want the string to contain at least 2 digits for the minutes as well.

index.js

Copied!
function padTo2Digits(num) {
  return num.toString().padStart(2, '0');
}

function convertMsToMinutesSeconds(milliseconds) {
  const minutes = Math.floor(milliseconds / 60000);
  const seconds = Math.round((milliseconds % 60000) / 1000);

  return seconds === 60
    ? `${padTo2Digits(minutes + 1)}:00`
    : `${padTo2Digits(minutes)}:${padTo2Digits(seconds)}`;
}

console.log(convertMsToMinutesSeconds(296900)); // 👉️ 04:57
console.log(convertMsToMinutesSeconds(296499)); // 👉️ 04:56
console.log(convertMsToMinutesSeconds(992000)); // 👉️ 16:32

We used the padTo2Digits to add a leading zero if the minutes are less than 10.

The function returns a string that is formatted as mm:ss, but you could tweak this depending on your use case.

I wrote a book in which I share everything I know about how to become a better, more efficient programmer.

You can use the search field on my Home Page to filter through all of my articles.

Convert Milliseconds to Minutes and Seconds in JavaScript

Convert Milliseconds to Minutes and Seconds in JavaScript #

Borislav Hadzhiev