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