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