There are total 8 hours or 480 minutes from 1am to 9am. In words, this duration is equal to eight hours or four hundred eighty minutes.
How many hours from
| 1PM to 1AM | 1AM to 5AM | 5AM to 9AM |
| 6PM to 10PM | 7PM to 9AM | 7PM to 5PM |
| 10AM to 3AM | 12AM to 12PM | 3AM to 7PM |
| 11PM to 1AM | 6PM to 12AM | 1AM to 7PM |
| 2PM to 6PM | 12AM to 3AM | 9PM to 12AM |
| 8AM to 4AM | 1AM to 7AM | 12PM to 7AM |
