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
| 5AM to 9PM | 2AM to 9AM | 12AM to 10PM |
| 11AM to 4PM | 5PM to 1AM | 11AM to 10AM |
| 2PM to 8PM | 10AM to 1AM | 11AM to 2AM |
| 10AM to 9AM | 11AM to 8PM | 11PM to 4AM |
| 3AM to 4PM | 2AM to 4PM | 8AM to 8PM |
| 11AM to 10AM | 12PM to 2PM | 7PM to 5AM |
