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