How to add time
- Choose A time, or A date and time to see the date you land on.
- Type the start Time as 9:00, 21:00 or 9:00 pm, and choose Add or Subtract.
- Enter the hours, minutes and seconds (and days) and read the new time, in 12-hour and 24-hour form.
Worked examples
| Start | Add or subtract | Result |
|---|---|---|
| 9:00 am | + 8 h 30 min | 5:30 pm |
| 9:00 pm | + 5 h 30 min | 2:30 am, next day |
| 1:00 am | − 2 h | 11:00 pm, previous day |
| 31 Dec, 10:00 pm | + 1 day 3 h | 1:00 am on 2 Jan |
| 14:45 | + 90 min | 16:15 |
Typical uses
Working out when a shift, a flight or a cooking time ends; when to take the next dose of something every 8 hours; or what time it was a certain number of hours ago. For the reverse question, how much time there is between two times, use the time duration calculator.