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