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