There are total 8 hours or 480 minutes from 1pm to 9pm. In words, this duration is equal to eight hours or four hundred eighty minutes.
How many hours from
| 10PM to 11AM | 8AM to 11AM | 10AM to 3PM |
| 1AM to 9PM | 10PM to 10AM | 9PM to 4PM |
| 3PM to 7PM | 6PM to 12PM | 7AM to 6PM |
| 6PM to 1PM | 10PM to 6AM | 1PM to 12PM |
| 2AM to 11PM | 7AM to 10PM | 3PM to 12AM |
| 12PM to 9PM | 11AM to 2AM | 7AM to 2PM |
