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