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