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