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