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