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