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