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