Hours and minutes calculator
For 38 hours 50 minutes plus 6 hours 25 minutes, the hours and minutes calculator gives 45 hours 15 minutes, which is 45.25 decimal hours.
Total
- As hours:minutes:seconds Hours are not rolled into days here, which is how a timesheet or a race total is written.
- 45:15:00
- In decimal hours Total seconds divided by 3,600. This is the form an hourly rate multiplies.
- 45.25 h
- In minutes
- 2,715 min
- In seconds
- 162,900 s
- In days
- 1.8854167 days
- Working Each time is converted to seconds (days × 86,400 + hours × 3,600 + minutes × 60 + seconds), the seconds are added or subtracted, and the total is split back into units.
- 38 h 50 min = 139,800 s; 6 h 25 min = 23,100 s; 139,800 + 23,100 = 162,900 s = 45 h 15 min
How the Time Calculator works
To add hours and minutes, add the minutes, add the hours, and carry every 60 minutes into an hour. For 38 h 50 min + 6 h 25 min: the minutes are 50 + 25 = 75, which is 1 hour 15 minutes, so keep 15 and carry 1. The hours are 38 + 6 + 1 = 45. The total is 45 h 15 min.
To subtract, take the minutes first and borrow an hour as 60 minutes when the minutes being taken away are larger. 8 h 15 min - 3 h 40 min becomes 7 h 75 min - 3 h 40 min, which is 4 h 35 min.
For pay, convert the minutes to a decimal by dividing by 60: 15 ÷ 60 = 0.25, so 45 h 15 min is 45.25 hours. At $22 an hour that is 45.25 × 22 = $995.50. Reading 45:15 as 45.15 hours underpays by six minutes, because 0.15 of an hour is 9 minutes. Going the other way, multiply the decimal part by 60: 7.6 hours is 7 hours and 0.6 × 60 = 36 minutes.
A week of shifts adds the same way, a column at a time. Monday to Friday at 8:15, 7:50, 8:30, 8:05 and 7:45 gives 15 + 50 + 30 + 5 + 45 = 145 minutes, which is 2 h 25 min, and 8 + 7 + 8 + 8 + 7 = 38 hours. The week is 40 h 25 min.
Time Calculator FAQ
What is 1 hour 45 minutes plus 45 minutes?
2 hours 30 minutes. The minutes are 45 + 45 = 90, which is 1 hour 30 minutes, and 1 + 1 = 2 hours.
How many minutes are in 4 hours 35 minutes?
275: 4 × 60 = 240, plus 35.
How do I write hours and minutes on a timesheet?
Use whatever the timesheet asks for. If it wants decimal hours, divide the minutes by 60 and round to two places: 7 h 20 min is 7.33. If it wants h:mm, 7:20 is already right.