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