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
| 11AM to 10AM | 2PM to 6AM | 2PM to 10AM |
| 10PM to 7PM | 12PM to 1AM | 3PM to 6PM |
| 10AM to 8AM | 4PM to 10PM | 3AM to 5PM |
| 11PM to 3AM | 1PM to 11PM | 7PM to 5AM |
| 2PM to 1AM | 5PM to 7AM | 11AM to 8AM |
| 2PM to 8PM | 1AM to 5PM | 11PM to 8PM |
