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