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
| 9AM to 5PM | 2AM to 6AM | 1AM to 1PM |
| 4PM to 8PM | 10AM to 8AM | 4PM to 9AM |
| 8PM to 11AM | 6PM to 7PM | 8PM to 10AM |
| 10PM to 1AM | 1PM to 5AM | 5AM to 1PM |
| 3PM to 7PM | 10PM to 9PM | 12AM to 7PM |
| 5PM to 12AM | 3AM to 7PM | 12AM to 8AM |
