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