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