There are total 12 hours or 720 minutes from 9am to 9pm. In words, this duration is equal to twelve hours or seven hundred twenty minutes.
How many hours from
| 8AM to 10PM | 6AM to 10PM | 12PM to 9AM |
| 11AM to 8AM | 11PM to 12AM | 2AM to 9AM |
| 5AM to 9PM | 3PM to 1AM | 6PM to 7AM |
| 9PM to 9AM | 1PM to 5PM | 11PM to 5AM |
| 4AM to 5AM | 11PM to 12PM | 10AM to 2AM |
| 12AM to 6PM | 9PM to 7AM | 3PM to 7AM |
