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