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