There are total 4 hours or 240 minutes from 9pm to 1am. In words, this duration is equal to four hours or two hundred forty minutes.
How many hours from
| 4PM to 7PM | 5AM to 3PM | 11AM to 1AM |
| 11PM to 10AM | 9AM to 2PM | 6PM to 5PM |
| 2PM to 8AM | 3AM to 9AM | 11AM to 4AM |
| 9PM to 10AM | 10AM to 4AM | 8PM to 6AM |
| 2AM to 8AM | 11AM to 6PM | 4PM to 3AM |
| 4PM to 2AM | 11PM to 6AM | 7AM to 8PM |
