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