I have a website where users enter data including hours, for example they enter '1:00' (Meaning = 1 hour) and '00:15' (Meaning = 15 minutes) and '2:30' (Meaning = 2 hour and 30 minutes).

Now I need to make show them how many hours they have entered in total, when I calculate it by just doing $count += $time in a loop I am getting the correct number but not what is standing after the ':'. 

1:00 + 00:15 + 2:30 will become '3' while it should be 3:45. 

How would I do this? Also now that I am thinking about it, I will also need if it goes over 60 it adds 1 to the first number (A new hour).

Thanks.