There are total 9 hours or 540 minutes from 4pm to 1am. In words, this duration is equal to nine hours or five hundred forty minutes.
How many hours from
| 7PM to 9PM | 10PM to 5AM | 1PM to 8AM |
| 12PM to 4AM | 6PM to 7PM | 11AM to 6PM |
| 1AM to 1PM | 9AM to 7AM | 1AM to 7PM |
| 11AM to 7AM | 5AM to 1PM | 12AM to 7PM |
| 4PM to 11PM | 12AM to 11PM | 5AM to 9AM |
| 11PM to 6AM | 12AM to 7AM | 7PM to 9PM |
