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