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