There are total 9 hours or 540 minutes from 4am to 1pm. In words, this duration is equal to nine hours or five hundred forty minutes.
How many hours from
| 9PM to 12AM | 11PM to 9AM | 9AM to 6AM |
| 5PM to 2PM | 3PM to 12AM | 2PM to 8PM |
| 10PM to 1AM | 2PM to 10PM | 7AM to 11AM |
| 3AM to 2PM | 3PM to 9AM | 10AM to 7PM |
| 5PM to 2PM | 3AM to 11PM | 4AM to 8AM |
| 11PM to 6PM | 8PM to 3AM | 12PM to 4PM |
