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