There are total 11 hours or 660 minutes from 9am to 8pm. In words, this duration is equal to eleven hours or six hundred sixty minutes.
How many hours from
| 1PM to 5AM | 9AM to 1PM | 8PM to 8AM |
| 11PM to 11AM | 5AM to 5PM | 2AM to 12AM |
| 9PM to 1AM | 12PM to 1PM | 5PM to 6AM |
| 12AM to 11PM | 7PM to 2AM | 4PM to 4AM |
| 3AM to 2PM | 10PM to 12PM | 11AM to 3PM |
| 12PM to 10AM | 6AM to 1PM | 2PM to 12PM |
