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