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