Decimal minutes

Question

Hi not sure if this is the right forum for this but does anyone know the formula for converting decimal time in to hours and minutes ?

IE 1.4 = 1hr 24mins

thanks for any help and sorry if its the wrong forum

Not sure what you intend on using this for, but if you're using this to describe how long ago something happened from the current point in time, take a look at: http://stackoverflow.com/questions/11/how-do-i-calculate-relative-time/501415#501415 — John Rasch, Apr 15 '10 at 18:58

score 15 · Accepted Answer · answered Apr 15 '10 at 18:55

15

$decTime = 1.4;
$hour = floor($decTime);
$min = round(60*($decTime-$hour));

answered Apr 15 '10 at 18:55

James B

Note the round on the minutes. I had it as a floor and some of the time display wasn't showing correctly by a minute. So annoying! Thanks guys! – cbloss793 Oct 26 '16 at 16:14

score 4 · Answer 2 · answered Apr 15 '10 at 18:53

Simply take the decimal portion of the hours and multiply by 60 for the number of minutes.

In your example .4 (the decimal portion of 1.4) * 60 = 24 minutes

So if you need to do it in code, subtract the floor of the original number from the original number to get the decimal portion.

score 2 · Answer 3 · edited May 23 '17 at 11:48

2

Hours: floor( decimal )
Minutes: round( ( decimal * 60 ) mod 60 )

James is right about the rounding. I forgot to account for that. Adjusted.

edited May 23 '17 at 11:48

Community

answered Apr 15 '10 at 18:56

Decent Dabbler

score 1 · Answer 4 · answered Apr 15 '10 at 18:55

1

Floor the number to get how many hours. Number - floored value [the decimal] * 60 = minutes [round it after]

answered Apr 15 '10 at 18:55

Warty

4 Answers4