How to add hours and minutes?

Add minutes separately. If minutes exceed 60, carry over to hours. Example: 2:45 + 1:30 = 4:15.

How many minutes in an hour?

There are 60 minutes in 1 hour.

Divide minutes by 60. Example: 150 minutes = 150/60 = 2.5 hours = 2 hours 30 minutes.

24 × 60 × 60 = 86,400 seconds in one day.

Subtract the earlier time from the later time. Convert to the same units first if needed.

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