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