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