How many hours is 12pm to 9pm?
12pm to 9pm
9 hours
12pm to 9pm is 9 hours, or 540 minutes.
- Hours and minutes
- 9 hours
- Total minutes
- 540
- Decimal hours
- 9
- With a 30-minute unpaid break
- 8 hours 30 minutes (8.5 decimal hours)
- Crosses midnight
- No
- 24-hour notation
- 12:00 to 21:00
About this shift
The shift starts at noon and ends late in the evening on the same date. It doesn't cross midnight, so the hours are a plain subtraction. It begins right at noon and finishes at 9pm, 3 hours before midnight.
9 hours is 1 hour more than an 8-hour day. Four of these shifts come to 36 hours a week, and five come to 45 hours.
If you take a 30-minute unpaid break, 8 hours 30 minutes remain, which a timesheet in decimal hours shows as 8.5. The 30 minutes is an example, not a legal rule. Break and overtime rules depend on your contract and where you work. This page gives clock time only.
12pm is noon and 12am is midnight.
How the hours are worked out
- Write both times in 24-hour form: 12:00 and 21:00.
- Subtract. 21:00 − 12:00 = 9:00, which is 9 hours.
- For minutes, 9 × 60 = 540. For decimal hours, 540 ÷ 60 = 9.
- With the break, 540 − 30 = 510 minutes, or 8 hours 30 minutes.
Nearby start and end times
Other times, or a whole week
The hours calculator takes your own start and end time for each day, a break per day and an optional hourly rate, and adds up the week. Open the hours calculator