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