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