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