There are total 9 hours or 540 minutes from 4pm to 1am. In words, this duration is equal to nine hours or five hundred forty minutes.
How many hours from
| 1PM to 3PM | 2PM to 10AM | 6PM to 3PM |
| 10PM to 11PM | 12AM to 9AM | 6PM to 7PM |
| 1PM to 8PM | 12PM to 8AM | 8PM to 1AM |
| 11PM to 7AM | 4AM to 8AM | 6AM to 4PM |
| 10PM to 3PM | 10PM to 2PM | 1PM to 12PM |
| 7AM to 1PM | 10PM to 3PM | 7PM to 1AM |
