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