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