There are total 9 hours or 540 minutes from 12pm to 9pm. In words, this duration is equal to nine hours or five hundred forty minutes.
How many hours from
| 1AM to 8PM | 8AM to 12AM | 6AM to 5PM |
| 10PM to 4PM | 12PM to 5PM | 9PM to 8AM |
| 8PM to 5AM | 6PM to 11PM | 10PM to 6AM |
| 8PM to 7PM | 7PM to 6AM | 2AM to 6PM |
| 9PM to 2PM | 3AM to 10AM | 1AM to 12AM |
| 10AM to 9PM | 1PM to 6AM | 9AM to 11AM |
