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