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