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
| 6AM to 5AM | 3PM to 12PM | 3PM to 7PM |
| 9PM to 6PM | 1AM to 3AM | 1AM to 9PM |
| 12PM to 12AM | 9PM to 1AM | 9PM to 2AM |
| 11AM to 7PM | 6PM to 4PM | 9PM to 5AM |
| 10PM to 7PM | 7PM to 12PM | 12PM to 4PM |
| 1PM to 4PM | 8PM to 12AM | 6AM to 11AM |
