There are total 1 hours or 60 minutes from 9pm to 10pm. In words, this duration is equal to one hours or sixty minutes.
How many hours from
| 11PM to 3PM | 10AM to 7PM | 2AM to 12PM |
| 1AM to 12PM | 12AM to 4PM | 12PM to 4PM |
| 12PM to 8AM | 12AM to 4PM | 12PM to 5PM |
| 8PM to 4AM | 5AM to 1PM | 10PM to 9PM |
| 12AM to 5PM | 8AM to 7PM | 2PM to 6PM |
| 5PM to 3AM | 7AM to 8AM | 9PM to 7PM |
