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