There are total 13 hours or 780 minutes from 9am to 10pm. In words, this duration is equal to thirteen hours or seven hundred eighty minutes.
How many hours from
| 7PM to 7AM | 6AM to 4PM | 2PM to 7AM |
| 6AM to 7PM | 2AM to 7AM | 7PM to 11AM |
| 2PM to 2AM | 4AM to 11PM | 4PM to 2AM |
| 4AM to 11AM | 1PM to 8PM | 3PM to 1PM |
| 12AM to 2PM | 12PM to 1AM | 7PM to 9AM |
| 10PM to 4AM | 11PM to 4AM | 2AM to 4PM |
