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