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