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