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