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