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