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