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