How to convert minutes to hours/minutes and add va

Question

There are a couple parts to this question. I am not opposed to using a jQuery plugin if anyone knows of one that will accomplish what I want done.

Q1 - How do I convert minutes into hours and vise versa? For example how would I convert 90 minutes into 1 hour and 30 minutes. In the code below how would I get "totalMin" converted and displayed in "convertedHour" and "convertedMin"?

HTML:

<span class="totalMin">90</span> Minutes

<span class="convertedHour">0</span> Hours
<span class="convertedMin">0</span> Minutes

jsFiddle: http://jsfiddle.net/ExFBD

Q2 - How would I add up a group of time slots? For example, How would I add 1 hour 30 mins, 2 hours 45 mins and 2 hour 15 mins together?

HTML:

<span class="hour-1 hour">1</span> hour
<span class="min-1 min">30</span> min

<span class="hour-2 hour">2</span> hour
<span class="min-2 min">45</span> min

<span class="hour-3 hour">2</span> hour
<span class="min-3 min">15</span> min


<span class="totalHour">0</span> hour
<span class="totalMin">0</span> min

jsFiddle: http://jsfiddle.net/DX9YA/

Q3 - How would I take a time value (3 hours and 30 mins) and add it to a real time stamp such as 10:30 AM? How would I take AM vs PM into account?

Answer 1

var timeConvert = function(n){
 var minutes = n%60
 var hours = (n - minutes) / 60
 console.log(hours + ":" + minutes)
}
timeConvert(65)

this will log 1:5 to the console. It is a short and simple solution that should be easy to understand and no jquery plugin is necessary...

Answer 2

Alternated to support older browsers.

function minutesToHHMM (mins, twentyFour) {
  var h = Math.floor(mins / 60);
  var m = mins % 60;
  m = m < 10 ? '0' + m : m;

  if (twentyFour === 'EU') {
    h = h < 10 ? '0' + h : h;
    return h+':'+m;
  } else {
    var a = 'am';
    if (h >= 12) a = 'pm';
    if (h > 12) h = h - 12;
    return h+':'+m+a;
  }
}

Answer 3

In case you want to return a string in 00:00 format...

convertMinsToHrsMins: function (minutes) {
  var h = Math.floor(minutes / 60);
  var m = minutes % 60;
  h = h < 10 ? '0' + h : h;
  m = m < 10 ? '0' + m : m;
  return h + ':' + m;
}

Thanks for the up-votes. Here's a slightly tidier ES6 version :)

function convertMinsToHrsMins(mins) {
  let h = Math.floor(mins / 60);
  let m = mins % 60;
  h = h < 10 ? '0' + h : h;
  m = m < 10 ? '0' + m : m;
  return `${h}:${m}`;
}

Answer 4

function parseMinutes(x){hours=Math.floor(x/60); minutes=x% 60;}
function parseHours(H,M){x=M+H*60;}

Answer 5

Not a jquery plugin, but the DateJS Library appears to do what you require. The Getting Started page has a number of examples.

Answer 6

The function below will take as input # of minutes and output time in the following format: Hours:minutes. I used Math.trunc(), which is a new method added in 2015. It returns the integral part of a number by removing any fractional digits.

function display(a){
  var hours = Math.trunc(a/60);
  var minutes = a % 60;
  console.log(hours +":"+ minutes);
}

display(120); //"2:0"
display(60); //"1:0:
display(100); //"1:40"
display(126); //"2:6"
display(45); //"0:45"