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