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