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