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