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