maria - 1 year ago 86

Javascript Question

How can i make the function round to nearest 15 minute, not rounding down?

if its 10:46 it would round to 11:00

jsfiddle: https://jsfiddle.net/31L9d08s/

code:

`var now = new Date();`

var Minutes = now.getMinutes();

var quarterHours = Math.round(Minutes/15);

if (quarterHours == 4)

{

now.setHours(now.getHours()+1);

}

var rounded = (quarterHours*15)%60;

now.setMinutes(rounded);

now.setSeconds(0);

now.setMilliseconds(0);

console.log(now.getTime());

var currentdate = new Date(now.getTime());

var datetime = "Last Sync: " + currentdate.getDate() + "/"

+ (currentdate.getMonth()+1) + "/"

+ currentdate.getFullYear() + " @ "

+ currentdate.getHours() + ":"

+ currentdate.getMinutes() + ":"

+ currentdate.getSeconds();

console.log(datetime);

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Answer Source

How about this:

```
new Date(Math.ceil(new Date().getTime()/900000)*900000);
```

Explanation: `new Date().getTime()`

returns the current time in the form of a unix timestamp (i.e. the number of milliseconds since 1970-01-01 00:00 UTC), which we round up to the nearest multiple of 900000 (i.e. the number of milliseconds in a quarter-hour) with the help of `Math.ceil`

.

**Edit**: If you want to apply this to intervals other than 15 minutes, you can do it like that (e.g. for 30 minutes):

```
var interval = 30 * 60 * 1000; // 30 minutes in milliseconds
new Date(Math.ceil(new Date().getTime()/interval)*interval);
```

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