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