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