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