Date & TimeAdd or subtract time
Two ways to do sums with time. Add or take away hours and minutes from a clock time, or add up a list of durations and see the total in hours and minutes and as decimal hours.
- A time plus or minus hours and minutes, and which day it lands on.
- Durations added and taken away: 1:45 + 2:30 − 0:50.
- Totals in hours and minutes, decimal hours and minutes.
- Free
- Works offline after your first visit
- Saves on this device
- No sign-up
- Updated
- Size 26 KB
Try an example
- Shift endStart at 10:30 PM, add 8 h 30 min
- When to leaveBe there at 9:00 AM, minus 1 h 45 min
- Oven timerIn at 4:50 PM for 75 minutes
- Add up a week of hours8:15 + 7:50 + 9:05 + 6:40 + 8:00
- A playlist's length3h 20m + 45m + 1:05
- Time left in a shift8:00 − 5:35
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Questions
How do I add hours and minutes?
Add the minutes, and every 60 minutes carries over as an hour. 1:45 + 2:30 is 3 hours 75 minutes, which is 4 hours 15 minutes. The sum box does this for any list.
How do I type a length of time?
1:45 means 1 hour 45 minutes. You can also type 2h 30m, 1.5h, or a plain number, which counts as minutes: 90 is an hour and a half.
What if the answer goes past midnight?
It says so. 9:45 PM plus 3 hours 30 minutes is 1:15 AM the next day, and 12:15 AM minus 45 minutes is 11:30 PM the day before.
How do I turn minutes into decimal hours?
Divide the minutes by 60. 3 hours 25 minutes is 3 + 25 ÷ 60 = 3.42 hours. The sum shows both.
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