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
| 5PM to 9PM | 1PM to 3PM | 5PM to 1PM |
| 4PM to 6PM | 6AM to 2PM | 7AM to 2PM |
| 8AM to 12PM | 4PM to 9PM | 10AM to 8PM |
| 10AM to 4AM | 6PM to 10PM | 8AM to 10PM |
| 9AM to 5PM | 3AM to 7AM | 7AM to 1PM |
| 12AM to 1PM | 8AM to 12PM | 3AM to 9PM |
